KS3 Science Physics "WAVES - light and sound"

Which of the following gives out its own light? [8k-1]
1. a star
2. the Moon
3. white paint
4. a mirror
Which of the following gives out light? [8k-2]
1. the Moon
2. a candle
3. white paint
4. a mirror
Which of the following gives out light? [8k-3]
1. white paint
2. the Moon
3. an electric lamp
4. a mirror
Which of the following is seen by reflected light? [8k-4]
1. a star
2. a candle
3. an electric lamp
4. the Moon
When materials are placed in the path of a light beam various things can happen. Which word describes materials that allow light through easily giving a clear image? [8k-5]
1. transparent
2. translucent
3. opaque
When materials are placed in the path of a light beam various things can happen. Which word describes materials that allow light through but scatters it around? [8k-6]
1. transparent
2. translucent
3. opaque
When materials are placed in the path of a light beam various things can happen. Which word describes materials that will not allow light through? [8k-7]
1. transparent
2. translucent
3. opaque
When materials are placed in the path of a light beam various things can happen. Which word describes materials that 'bounce' light off? [8k-8]
1. transparent
2. translucent
3. opaque
4. reflector
When materials are placed in the path of a light beam various things can happen. Which word describes materials that neither bounce light off or allow light through? [8k-9]
1. absorber
2. translucent
3. reflector
4. transparent
When materials are placed in the path of a light beam various things can happen. Which word describes materials that allow light through without scattering? [8k-10]
1. reflector
2. transparent
3. opaque
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word mainly describes the behaviour of glass when light is shone on it? [8k-11]
1. opaque
2. absorbed
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of tracing paper when light is shone on it? [8k-12]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of soil when light is shone on it? [8k-13]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of aluminium foil when light is shone on it? [8k-14]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word mainly describes the behaviour of water when light is shone on it? [8k-15]
1. opaque
2. absorbed
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of fog when light is shone through it? [8k-16]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of wood when light is shone on it? [8k-17]
1. opaque
2. total reflector
3. partly transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of chromium plated steel when light is shone on it? [8k-18]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of air when light is shone on it? [8k-19]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of ground glass or frosted glass when light is shone on it? [8k-20]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word mainly describes the behaviour of carpet when light is shone on it? [8k-21]
1. opaque
2. reflect
3. transparent
4. translucent
When materials are placed in the path of a light beam various things can happen. Which word describes the behaviour of polished brass pot when light is shone on it? [8k-22]
1. opaque
2. reflect
3. transparent
4. translucent
When an incident ray of light hits a water or glass surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is the correct reflected ray? [8k-23]
1. ray 2
2. ray 3
3. ray 1
4. ray 4
When an incident ray of light hits a water or glass surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is the correct refracted ray? [8k-24]
1. ray 2
2. ray 3
3. ray 1
4. ray 4
In the diagram an incident ray of light hits a transparent surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is the correct reflected ray? [8k-25]
1. ray 4
2. ray 2
3. ray 1
4. ray 3
In the diagram an incident ray of light hits a transparent surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is the correct refracted ray? [8k-26]
1. ray 4
2. ray 2
3. ray 1
4. ray 3
Which word means the ray 'bouncing off a surface' like ray 4? [8k-27]
1. induction
2. transformation
3. reflection
4. refraction
Which word means the ray 'bends at a medium change' like ray2? [8k-28]
1. induction
2. transformation
3. reflection
4. refraction
Which colour combination produces the colour yellow? [8k-29]
1. red and green
2. blue and red
3. green and blue
4. red, green and blue
Which colour combination produces the colour magenta? [8k-30]
1. red and green
2. blue and red
3. green and blue
4. red, green and blue
Which colour combination produces the colour cyan? [8k-31]
1. red and green
2. blue and red
3. green and blue
4. red, green and blue
Which colour combination produces the colour white? [8k-32]
1. red and green
2. blue and red
3. green and blue
4. red, green and blue
Which of the following times will it take for light to come to your eyes from a lightning flash a few miles away? [8k-33]
1. 1/100000th of a second
2. 1.3 seconds
3. 8.5 minutes
4. 4.3 years
Which of the following times will it take for light to come to your eyes from sunlight reflected off the moon? [8k-34]
1. 1/100000th of a second
2. 1.3 seconds
3. 8.5 minutes
4. 4.3 years
Which of the following times will it take for light to come to your eyes from our Sun? [8k-35]
1. 1/100000th of a second
2. 1.3 seconds
3. 8.5 minutes
4. 4.3 years
Which of the following times will it take for light to come to your eyes from Alpha Centauri, the next nearest star to us after the Sun? [8k-36]
1. 1/100000th of a second
2. 1.3 seconds
3. 8.5 minutes
4. 4.3 years
The diagram shows what happens to a ray of light when it strikes the surface of a plane mirror. The vertical dotted line is at 90^o to the surface of the mirror. Which statement is NOT true? [8k-37]
1. angle 1 always equals angle 3
2. angle 2 always equals angle 3
3. angle 2 = angle of incidence
4. angle 3 = angle of reflection
The diagram shows what happens to a ray of light when it strikes the surface of a plane mirror. The vertical dotted line is at 90^o to the surface of the mirror. Which statement is NOT true? [8k-38]
1. angle 1 always equals angle 4
2. angle 2 always equals angle 4
3. angle 2 = angle of incidence
4. angle 3 = angle of reflection
The diagram shows what happens to a ray of light when it strikes the surface of a plane mirror. The vertical dotted line is at 90^o to the surface of the mirror. Which statement is NOT true? [8k-39]
1. angle 1 always equals angle 4
2. angle 2 always equals angle 3
3. angle 1 = angle of incidence
4. angle 3 = angle of reflection
The diagram shows what happens to a ray of light when it strikes the surface of a plane mirror. The vertical dotted line is at 90^o to the surface of the mirror. Which statement is NOT true? [8k-40]
1. angle 1 always equals angle 4
2. angle 2 always equals angle 3
3. angle 2 = angle of incidence
4. angle 3 = angle of refraction
The diagram shows what happens to a ray of light when it strikes the surface of a thick glass plane mirror. Which statement is NOT true? [8k-41]
1. 1 is the only incident ray
2. 3 and 4 are reflected rays
3. 2 and 5 are refracted rays
4. 4 and 5 are dimmer rays than ray 1
The diagram shows what happens to a ray of light when it strikes the surface of a thick glass plane mirror. Which statement is NOT true? [8k-42]
1. 1 and 2 are incident rays
2. 4 and 5 are reflected rays
3. 2 and 5 are refracted rays
4. 4 and 5 are dimmer rays than ray 1
The diagram shows what happens to a ray of light when it strikes the surface of a thick glass plane mirror. Which statement is NOT true? [8k-43]
1. 1 and 2 are incident rays
2. 3 and 4 are reflected rays
3. 2 and 4 are refracted rays
4. 4 and 5 are dimmer rays than ray 1
The diagram shows what happens to a ray of light when it strikes the surface of a thick glass plane mirror. Which statement is NOT true? [8k-44]
1. 1 and 2 are incident rays
2. 3 and 4 are reflected rays
3. 2 and 5 are refracted rays
4. 4 and 5 are brighter rays than ray 1
Which optical effect is produced by the first interface of block 1? [8k-45]
1. effect V
2. effect W
3. effect Z
4. effect Y
5. effect X
Which optical effect is produced by the first interface of mirror 2? [8k-46]
1. effect V
2. effect W
3. effect X
4. effect Y
5. effect Z
Which optical effect is produced by the first interface of block 3? [8k-47]
1. effect Z
2. effect W
3. effect X
4. effect Y
5. effect V
Which optical effect is produced by the first interface of prism 4? [8k-48]
1. effect X
2. effect W
3. effect Z
4. effect Y
5. effect V
Which optical effect is produced by the first interface of prism 5? [8k-49]
1. effect V
2. effect W
3. effect Z
4. effect Y
5. effect X
Which optical effect is produced by the first interface of prism 6? [8k-50]
1. effect V
2. effect W
3. effect Z
4. effect Y
5. effect X
Which optical effect is produced by the first interface of prism 7? [8k-51]
1. effect X
2. effect W
3. effect Z
4. effect Y
5. effect V
Which pieces of apparatus will best produce a good visible spectrum of colours from the drawn ray? [8k-52]
1. 1 and 3 only
2. 5 and 7 only
3. 2 and 7 only
4. 4, 6 and 7
White light is passed through a clear plastic red filter. Which colour is produced on the white screen? [8k-53]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
White light is passed through a clear plastic green filter. Which colour is produced on the white screen? [8k-54]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
White light is passed through a clear plastic blue filter. Which colour is produced on the white screen? [8k-55]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
White light is passed through a clear plastic yellow filter. Which colour is produced on the white screen? [8k-56]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
White light is passed through a clear plastic cyan filter. Which colour is produced on the white screen? [8k-57]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
White light is passed through a clear plastic magenta filter. Which colour is produced on the white screen? [8k-58]
1. red
2. green
3. blue
4. yellow (green + red)
5. cyan (green + blue)
6. magenta (red + blue)
An object looks red in white light. The white light is passed through a clear plastic red filter onto the object in front of the screen. What colour will the object appear to be? [8k-59]
1. red
2. green
3. blue
4. white
5. black
6. cyan (green + blue)
An object looks green in white light. The white light is passed through a clear plastic blue filter onto the object in front of the screen. What colour will the object appear to be? [8k-60]
1. red
2. green
3. blue
4. white
5. black
6. yellow (red + green)
An object looks blue in white light. The white light is passed through a clear plastic blue filter onto the object in front of the screen. What colour will the object appear to be? [8k-61]
1. red
2. green
3. blue
4. white
5. black
6. yellow (red + green)
An object looks green in white light. The white light is passed through a clear plastic green filter onto the object in front of the screen. What colour will the object appear to be? [8k-62]
1. red
2. green
3. blue
4. white
5. black
6. magenta (red + blue)
An object looks red in white light. The white light is passed through a clear plastic green filter onto the object in front of the screen. What colour will the object appear to be? [8k-63]
1. red
2. green
3. blue
4. white
5. black
6. cyan (green + blue)
An object looks blue in white light. The white light is passed through a clear plastic red filter onto the object in front of the screen. What colour will the object appear to be? [8k-64]
1. red
2. green
3. blue
4. white
5. black
6. magenta (red + blue)
An object looks yellow in white light. The white light is passed through a clear plastic red filter onto the object in front of the screen. What colour will the object appear to be? [8k-65]
1. red
2. green
3. blue
4. white
5. black
An object looks yellow in white light. The white light is passed through a clear plastic green filter onto the object in front of the screen. What colour will the object appear to be? [8k-66]
1. red
2. green
3. blue
4. white
5. black
An object looks yellow in white light. The white light is passed through a clear plastic blue filter onto the object in front of the screen. What colour will the object appear to be? [8k-67]
1. red
2. green
3. blue
4. white
5. black
An object looks white in white light. The white light is passed through a clear plastic red filter onto the object in front of the screen. What colour will the object appear to be? [8k-68]
1. red
2. green
3. blue
4. cyan (green + blue)
5. black
An object looks white in white light. The white light is passed through a clear plastic green filter onto the object in front of the screen. What colour will the object appear to be? [8k-69]
1. red
2. green
3. blue
4. magenta (red + blue)
5. black
An object looks white in white light.
The white light is passed through a clear plastic blue filter onto the object in front of the screen. What colour will the object appear to be? [8k-70]
1. red
2. green
3. blue
4. yellow (red + green)
5. black
Which of the following statements about colour is NOT true? [8k-71]
1. an object looks red in white light because it reflects blue and green light
2. a green filter produces green light because it absorbs red and blue light
3. a blue object looks black in red or green light because it absorbs red or green light
4. an object looks black in white light because it absorbs red, green and blue light
5. an object looks white in white light because it reflects red, green and blue light
Which of the following statements about colour is NOT true? [8k-72]
1. an object looks red in white light because it absorbs blue and green light
2. a green filter produces green light because it reflects red and blue light
3. a blue object looks black in red or green light because it absorbs red or green light
4. an object looks black in white light because it absorbs red, green and blue light
5. an object looks white in white light because it reflects red, green and blue light
Which of the following statements about colour is NOT true? [8k-73]
1. an object looks red in white light because it absorbs blue and green light
2. a green filter produces green light because it absorbs red and blue light
3. a blue object looks black in red or green light because it reflects red or green light
4. an object looks black in white light because it absorbs red, green and blue light
5. an object looks white in white light because it reflects red, green and blue light
Which of the following statements about colour is NOT true? [8k-74]
1. an object looks red in white light because it absorbs blue and green light
2. a green filter produces green light because it absorbs red and blue light
3. a blue object looks black in red or green light because it absorbs red or green light
4. an object looks black in white light because it reflects red, green and blue light
5. an object looks white in white light because it reflects red, green and blue light
Which of the following statements about colour is NOT true? [8k-75]
1. an object looks red in white light because it absorbs blue and green light
2. a green filter produces green light because it absorbs red and blue light
3. a blue object looks black in red or green light because it absorbs red or green light
4. an object looks black in white light because it absorbs red, green and blue light
5. an object looks white in white light because it absorbs red, green and blue light
Which piece of apparatus mainly produces a reflection effect? [8k-76]
1. 1
2. 2
3. 3
4. 4
5. 5
In the diagram an incident ray of light hits a transparent surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is/are possible (i.e. optical effect correctly drawn)? [8k-77]
1. rays 2 and 4
2. ray 1 only
3. rays 1 and 4
4. ray 3 only
In the diagram an incident ray of light hits a transparent surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is/are possible (i.e. optical effect correctly drawn)? [8k-78]
1. rays 2 and 4
2. ray 1 only
3. rays 1 and 4
4. ray 3 only
Through which of the following will sound travel the fastest? [8L-1]
1. solids
2. gases
3. pure liquids
4. solutions
Through which of the following will sound travel the slowest? [8L-2]
1. solids
2. gases
3. pure liquids
4. solutions
Through which of the following will sound travel the fastest? [8L-3]
1. seawater
2. wooden plank
3. steel rail
4. air
Through which of the following will sound travel the slowest? [8L-4]
1. seawater
2. wooden plank
3. steel rail
4. air
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave was the quietist? [8L-5]
1. sound 1
2. sound 2
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave was the loudest? [8L-6]
1. sound 1
2. sound 2
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the lowest pitch? [8L-7]
1. sound 1
2. sound 2
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the highest pitch? [8L-8]
1. sound 1
2. sound 2
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the lowest frequency? [8L-9]
1. sound 3
2. sound 4
3. sound 1
4. sound 2
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the highest frequency? [8L-10]
1. sound 3
2. sound 4
3. sound 1
4. sound 2
Which of the following is TRUE about light and sound? [8L-11]
1. light waves travel faster than sound waves
2. you can have sound without anything vibrating
3. amplitude measures the frequency of a sound wave
4. light cannot pass through a vacuum
Which of the following is TRUE about light and sound? [8L-12]
1. light waves travel slower than sound waves
2. you cannot have sound without anything vibrating
3. amplitude measures the frequency of a sound wave
4. light cannot pass through a vacuum
Which of the following is TRUE about light and sound? [8L-13]
1. light waves travel slower than sound waves
2. you can have sound without anything vibrating
3. amplitude measures the loudness of a sound wave
4. light cannot pass through a vacuum
Which of the following is TRUE about light and sound? [8L-14]
1. light waves travel slower than sound waves
2. you can have sound without anything vibrating
3. amplitude measures the frequency of a sound wave
4. light can pass through a vacuum
Which of the following is TRUE about light and sound? [8L-15]
1. sound waves cannot travel through a vacuum
2. high or low pitch means a loud or soft sound
3. light cannot transfer energy
4. light cannot behave like a wave
Which of the following is TRUE about light and sound? [8L-16]
1. sound waves can travel through a vacuum
2. high or low pitch means a high or low frequency sound
3. light cannot transfer energy
4. light cannot behave like a wave
Which of the following is TRUE about light and sound? [8L-17]
1. sound waves can travel through a vacuum
2. high or low pitch means a loud or soft sound
3. light is a form of energy transfer
4. light cannot behave like a wave
Which of the following is TRUE about light and sound? [8L-18]
1. sound waves can travel through a vacuum
2. high or low pitch means a loud or soft sound
3. light cannot transfer energy
4. light behaves like a wave
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the smallest amplitude? [8L-19]
1. sound 3
2. sound 4
3. sound 1
4. sound 2
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave had the largest amplitude? [8L-20]
1. sound 3>
2. sound 4
3. sound 1
4. sound 2
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a lower pitched note in the wire sound? [8L-21]
1. thicker wire
2. shorter wire
3. plucking harder
4. tighter wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a higher pitched note in the wire sound? [8L-22]
1. thicker wire
2. tighter wire
3. plucking harder
4. longer wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a higher pitched note in the wire sound? [8L-23]
1. thicker wire
2. plucking harder
3. shorter wirer
4. slacker wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a louder note in the wire sound? [8L-24]
1. thicker wire
2. longer wire
3. tighter wire
4. plucking harder
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a higher pitched note in the wire sound? [8L-25]
1. thinner wire
2. longer wire
3. plucking harder
4. slacker wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a lower pitched note in the wire sound? [8L-26]
1. thinner wire
2. slacker wire
3. plucking more softly
4. shorter wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a lower pitched note in the wire sound? [8L-27]
1. shorter wire
2. thinner wire
3. longer wire
4. tighter wire
A steel wire was mounted on a board, so that the left hand bridge position could be changed, but fixed with an adjusting screw on the right to vary the tension on the wire. The wire thickness and length, its tension (tightness) and force applied can be varied to change the 'character' of the sound produced on plucking the wire. Which change will produce a softer note in the wire sound? [8L-28]
1. thinner wire
2. longer wire
3. slacker wire
4. plucking more lightly
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave was the softest? [8L-29]
1. sound 1
2. sound 2
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave has the lowest volume? [8L-30]
1. sound 2
2. sound 1
3. sound 3
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave was the largest volume? [8L-31]
1. sound 1
2. sound 3
3. sound 2
4. sound 4
Various sounds were recorded using a microphone and the signal displayed on an oscilloscope (CRO). Which sound wave picture shows exactly one complete wave? [8L-32]
1. sound 4
2. sound 1
3. sound 2
4. sound 3
Assume sketched same width of CRO screen and note the number of waves and their height. A class of students were listening to single music notes played into a microphone and the result displayed on a cathode ray oscilloscope (CRO). The students where asked to sketch pictures for each sound produced. A selection of their sketches is shown above. Which student has sketched the result of a loud highly pitched note? [8L-33]
1. FRED
2. JO
3. TANYA
4. RICKY
Assume sketched same width of CRO screen and note the number of waves and their height. A class of students were listening to single music notes played into a microphone and the result displayed on a cathode ray oscilloscope (CRO). The students where asked to sketch pictures for each sound produced. A selection of their sketches is shown above. Which student has sketched the result of a soft low pitched note? [8L-34]
1. FRED
2. JO
3. TANYA
4. RICKY
Assume sketched same width of CRO screen and note the number of waves and their height. A class of students were listening to single music notes played into a microphone and the result displayed on a cathode ray oscilloscope (CRO). The students where asked to sketch pictures for each sound produced. A selection of their sketches is shown above. Which student has sketched the result of a loud low pitched note? [8L-35]
1. FRED
2. JO
3. TANYA
4. RICKY
Assume sketched same width of CRO screen and note the number of waves and their height. A class of students were listening to single music notes played into a microphone and the result displayed on a cathode ray oscilloscope (CRO). The students where asked to sketch pictures for each sound produced. A selection of their sketches is shown above. Which student has sketched the result of a soft highly pitched note? [8L-36]
1. FRED
2. JO
3. TANYA
4. RICKY
A sound is most likely produced when an object? [8L-37]
1. vibrates
2. pitches
3. moves
4. gains energy
Another word for pitch is? [8L-38]
1. volume
2. frequency
3. amplitude
4. wavelength
Another word for frequency is? [8L-39]
1. wavelength
2. amplitude
3. pitch
4. volume
Which word relates to the loudness of sound waves? [8L-40]
1. wavelength
2. frequency
3. pitch
4. amplitude
What is the maximum safe time you should be exposed to a sound level of 103dB? [8L-41]
1. 1¹/₄ hours
2. ³/₄ hour
3. 1¹/₂ hours
4. 1³/₄ hours
What is the maximum safe time you should be exposed to a sound level of 107dB? [8L-42]
1. 1¹/₄ hours
2. ³/₄ hours
3. ¹/₂ hours
4. 1¹/₂ hours
What is the maximum sound level in decibels, you should be exposed to for 6 hours? [8L-43]
1. 95 dB
2. 93 dB
3. 92 dB
4. 97 dB
What is the maximum sound level in decibels, you should be exposed to for 3 hours? [8L-44]
1. 95 dB
2. 93 dB
3. 92 dB
4. 97 dB
What is the maximum sound level in decibels, you should be exposed to for 2 hours? [8L-45]
1. 100 dB
2. 98 dB
3. 102 dB
4. 101 dB
What is the maximum safe time you should be exposed to a sound level of 95 dB? [8L-46]
1. 3³/₄ hours
2. 4 hours
3. 4¹/₄ hours
4. 4¹/₂ hours
Which word relates to the loudness of sound waves? [8L-47]
1. wavelength
2. frequency
3. volume
4. pitch
Which is the unit for the loudness of sound? [8L-48]
1. hertz
2. metres
3. meters/second
4. decibels
Which is the unit for the frequency of sound waves? [8L-49]
1. hertz
2. metres
3. meters/second
4. decibels
Which is the unit for the frequency of sound waves? [8L-50]
1. m/s
2. Hz
3. dB
4. m
Which is the unit for the loudness of sound waves? [8L-51]
1. m/s
2. Hz
3. dB
4. m
Which is the unit for the volume of sound? [8L-52]
1. hertz
2. metres
3. meters/second
4. decibels
Which is NOT true about sound? [8L-53]
1. the flash from lightning arrives after the sound of the thunder
2. too loud a sound can't immediately damage your eardrum
3. the frequency of sound waves is the number of vibrations per second
4. hard smooth surfaces are good sound reflectors
Which is NOT true about sound? [8L-54]
1. the flash from lightning arrives before the sound of the thunder
2. a loud sound can only cause temporary damage to your eardrum
3. the frequency of sound waves is the number of vibrations per second
4. hard smooth surfaces are good sound reflectors
Which is NOT true about sound? [8L-55]
1. the flash from lightning arrives before the sound of the thunder
2. too loud a sound can immediately damage your eardrum
3. the volume of sound waves is usually the number of vibrations per second
4. hard smooth surfaces are good sound reflectors
Which is NOT true about sound? [8L-56]
1. the flash from lightning arrives before the sound of the thunder
2. too loud a sound can immediately damage your eardrum
3. the frequency of sound waves is the number of vibrations per second
4. hard smooth surfaces are good sound absorbers
Which is NOT true about sound? [8L-57]
1. sound travels faster than light
2. soft materials are good sound absorbers
3. eardrums can be gradually and permanently damaged by continuous moderately loud sounds
4. as a car accelerates the pitch of the engine increases
Which is NOT true about sound? [8L-58]
1. light travels much faster than sound
2. soft materials are poor sound absorbers
3. eardrums can be gradually and permanently damaged by continuous moderately loud sounds
4. as a car accelerates the pitch of the engine increases
Which is NOT true about sound? [8L-59]
1. light travels much faster than sound
2. soft materials are good sound absorbers
3. eardrums cannot be permanently damaged by continuous moderately loud sounds
4. as a car accelerates the pitch of the engine increases
Which is NOT true about sound? [8L-60]
1. light travels much faster than sound
2. soft materials are good sound absorbers
3. eardrums can be gradually and permanently damaged by continuous moderately loud sounds
4. as a car accelerates the pitch of the engine decreases
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which animal has the smallest frequency range of hearing? [8L-61]
1. Human
2. Dolphin
3. Bat
4. Cat
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which animal has the largest frequency range of hearing? [8L-62]
1. Human
2. Dolphin
3. Bat
4. Cat
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which animal(s) can hear a frequency of 108 000 Hz? [8L-63]
1. Bat only
2. Dolphin only
3. Bat and Dolphin
4. Cat and Dolphin
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which animal(s) can hear a frequency of 55 Hz? [8L-64]
1. Cat and Human
2. Dog and Human
3. Human only
4. Cat only
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which statement is NOT true about the hearing of animals? [8L-65]
1. a shepherd cannot use a whistle a sheep dog can hear but the sheep cannot hear
2. a bat and human can both hear some sounds of the same frequency
3. a cat can hear some high and low frequencies that humans cannot hear
4. bats and dolphins can hear sounds that most other animals cannot hear
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which statement is NOT true about the hearing of animals? [8L-66]
1. a shepherd can use a whistle a sheep dog can hear but the sheep cannot hear
2. a bat and human cannot both hear some sounds of the same frequency
3. a cat can hear some high and low frequencies that humans cannot hear
4. bats and dolphins can hear sounds that most other animals cannot hear
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which statement is NOT true about the hearing of animals? [8L-67]
1. a shepherd can use a whistle a sheep dog can hear but the sheep cannot hear
2. a bat and human can both hear some sounds of the same frequency
3. a cat cannot hear frequencies that humans cannot hear
4. bats and dolphins can hear sounds that most other animals cannot hear
TYPICAL FREQUENCY HEARING RANGES (Hertz)
ANIMAL LOWEST HIGHEST ANIMAL LOWEST HIGHEST
Sheep 100 30000 Human 64 23000
Cat 45 64000 Dolphin 200 150000
Dog 67 45000 Bat 2000 110000
Which statement is NOT true about the hearing of animals? [8L-68]
1. a shepherd can use a whistle a sheep dog can hear but the sheep cannot hear
2. a bat and human can both hear some sounds of the same frequency
3. a cat can hear some high and low frequencies that humans cannot hear
4. bats and dolphins can hear low frequency sounds that most other animals cannot hear
What is the maximum sound level in decibels, you should be exposed to for 1¹/₂ hours? [8L-69]
1. 102. dB
2. 101.5 dB
3. 102.5 dB
4. 103 dB
What is the maximum safe time you should be exposed to a sound level of 101dB? [8L-70]
1. 1¹/₄ hours
2. 1³/₄ hours
3. 1¹/₂ hours
4. 2 hours
Which statement is most likely to be TRUE? [8L-71]
1. only air vibrates when the flute is played
2. only the strings vibrate when the double base is played
3. the average pitch of the double base sound is lower than the average sound of the flute
4. the average frequency of the double base notes are higher than the average notes of the flute
Which statement is most likely to be TRUE? [8L-72]
1. only air vibrates when the flute is played
2. only the strings vibrate when the double base is played
3. the average pitch of the double base sound is higher than the average sound of the flute
4. the average frequency of the double base notes are lower than the average notes of the flute
Which statement is most likely to be TRUE? [8L-73]
1. both the flute and air vibrate when the flute is played
2. only the strings vibrate when the double base is played
3. the average pitch of the double base sound is higher than the average sound of the flute
4. the average frequency of the double base notes are higher than the average notes of the flute
Which statement is most likely to be TRUE? [8L-74]
1. only air vibrates when the flute is played
2. both the case and the strings vibrate when the double base is played
3. the average pitch of the double base sound is higher than the average sound of the flute
4. the average frequency of the double base notes are higher than the average notes of the flute
[8K-153] Which feature corresponds to a crest of a wave?
1. feature 1
2. feature 2
3. feature 3
4. feature 4
[8K-154] Which feature corresponds to the wavelength of a wave?
1. feature 1
2. feature 2
3. feature 3
4. feature 4
[8K-155] Which feature corresponds to a trough of a wave?
1. feature 1
2. feature 2
3. feature 3
4. feature 4
[8K-156] Which feature corresponds to the amplitude of a wave?
1. feature 1
2. feature 2
3. feature 3
4. feature 4
[8K-157] Which of the following statements is NOT true about waves?
1. Transverse waves oscillate at 180^o to their direction of travel.
2. Longitudinal waves oscillate in the same line as their direction of travel.
3. All waves can reflect off a smooth surface.
4. All waves can transfer energy from one place to another
[8K-158] Which of the following statements is NOT true about waves?
1. Transverse waves oscillate at 90^o to their direction of travel.
2. Longitudinal waves oscillate at 45^o to their direction of travel.
3. All waves can reflect off a smooth surface.
4. All waves can transfer energy from one place to another
[8K-159] Which of the following statements is NOT true about waves?
1. Transverse waves oscillate at 90^o to their direction of travel.
2. Longitudinal waves oscillate in the same line as their direction of travel.
3. Only transverse waves can reflect off a smooth surface.
4. All waves can transfer energy from one place to another
[8K-160] Which of the following statements is NOT true about waves?
1. Transverse waves oscillate at 90^o to their direction of travel.
2. Longitudinal waves oscillate in the same line as their direction of travel.
3. All waves can reflect off a smooth surface.
4. Only transverse waves can transfer energy from one place to another
[8k-161] Which of the following statements is NOT true about sound waves?
1. Sound consists of vibrations which travel as a transverse wave through substances - gas, liquid or solid.
2. Usually, the denser the medium, the faster sound travels.
3. The greater the amplitude of the waveform, the louder the sound.
4. The greater the frequency, the shorter the wavelength, the higher the pitch.
5. Sound waves cannot travel through a vacuum.
[8k-162] Which of the following statements is NOT true about sound waves?
1. Sound consists of vibrations which travel as a longitudinal wave through substances - gas, liquid or solid.
2. Usually, the less dense the medium, the faster sound travels.
3. The greater the amplitude of the waveform, the louder the sound.
4. The greater the frequency, the shorter the wavelength, the higher the pitch.
5. Sound waves cannot travel through a vacuum.
[8k-163] Which of the following statements is NOT true about sound waves?
1. Sound consists of vibrations which travel as a longitudinal wave through substances - gas, liquid or solid.
2. Usually, the denser the medium, the faster sound travels.
3. The smaller the amplitude of the waveform, the louder the sound.
4. The greater the frequency, the shorter the wavelength, the higher the pitch.
5. Sound waves cannot travel through a vacuum.
[8k-164] Which of the following statements is NOT true about sound waves?
1. Sound consists of vibrations which travel as a longitudinal wave through substances - gas, liquid or solid.
2. Usually, the denser the medium, the faster sound travels.
3. The greater the amplitude of the waveform, the louder the sound.
4. The greater the frequency, the longer the wavelength, the lower the pitch.
5. Sound waves cannot travel through a vacuum.
[8k-165] Which of the following statements is NOT true about sound waves?
1. Sound consists of vibrations which travel as a longitudinal wave through substances - gas, liquid or solid.
2. Usually, the denser the medium, the faster sound travels.
3. The greater the amplitude of the waveform, the louder the sound.
4. The greater the frequency, the shorter the wavelength, the higher the pitch.
5. Sound waves can travel through a vacuum.
[8k-166] Which of the following statements is NOT true about light waves?
1. They need a particle medium to travel through.
2. Light waves are slowed down by the particles of a low density medium.
3. All light waves travel at the same speed in a vacuum.
4. Light waves reflect off a smooth shiny surface at the same angle (regular/specular reflection).
5. Light waves reflect off a rough dull surface at a wide range of different angles (scattering/diffuse reflection).
6. In air, the speed of light is about a million times faster than the speed of sound.
[8k-167] Which of the following statements is NOT true about light waves?
1. They do not need a particle medium to travel through.
2. Light waves are not slowed down by the particles of a medium.
3. All light waves travel at the same speed in a vacuum.
4. Light waves reflect off a smooth shiny surface at the same angle (regular/specular reflection).
5. Light waves reflect off a rough dull surface at a wide range of different angles (scattering/diffuse reflection).
6. In air, the speed of light is about a million times faster than the speed of sound.
[8k-168] Which of the following statements is NOT true about light waves?
1. They do not need a particle medium to travel through.
2. Light waves are slowed down by the particles of a medium.
3. Different coloured light waves travel at different speeds in a vacuum.
4. Light waves reflect off a smooth shiny surface at the same angle (regular/specular reflection).
5. Light waves reflect off a rough dull surface at a wide range of different angles (scattering/diffuse reflection).
6. In air, the speed of light is about a million times faster than the speed of sound.
[8k-169] Which of the following statements is NOT true about light waves?
1. They do not need a particle medium to travel through.
2. Light waves are slowed down by the particles of a medium.
3. All light waves travel at the same speed in a vacuum.
4. Light waves reflecting off a smooth shiny surface at the same angle is called diffuse reflection.
5. Light waves reflect off a rough dull surface at a wide range of different angles (scattering reflection).
6. In air, the speed of light is about a million times faster than the speed of sound.
[8k-170] Which of the following statements is NOT true about light waves?
1. They do not need a particle medium to travel through.
2. Light waves are slowed down by the particles of a medium.
3. All light waves travel at the same speed in a vacuum.
4. Light waves reflect off a smooth shiny surface at the same angle (regular reflection).
5. Light waves reflect off a rough dull surface at a wide range of different angles called specular reflection).
6. In air, the speed of light is about a million times faster than the speed of sound.
[8k-171] Which of the following statements is NOT true about light waves?
1. They do not need a particle medium to travel through.
2. Light waves are slowed down by the particles of a medium.
3. All light waves travel at the same speed in a vacuum.
4. Light waves reflect off a smooth shiny surface at the same angle (regular/specular reflection).
5. Light waves reflect off a rough dull surface at a wide range of different angles (scattering/diffuse reflection).
6. In air, the speed of light is about a 1000 times faster than the speed of sound.
[8k-172]
Which of the following features is a convex lens?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-173]
Which of the following features can change shape to help focus the image?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-174]
Which of the following features conveys the nerve signals to the brain?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-175]
Which of the following features contains the light sensitive receptor cells?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-176]
Which of the following features behaves in a similar way to the photocell of a digital camera?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-177]
Which of the following features controls the amount of light that enters the eye?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-178]
Which of the following features behaves in a similar way to the film of a camera?
1. feature 1
2. feature 5
3. feature 3
4. feature 4
5. feature 2
[8k-179] Which of the following is NOT true about light waves?
1. The frequency of light waves is the number of complete waves that pass a point per hour.
2. The frequency of visible light waves increases from red to violet.
3. Infrared and ultraviolet radiations are invisible to the human eye.
4. Visible light consists of transverse waves of electromagnetic radiation.
5. Light waves slow down when they pass from a less dense medium to a more dense medium.
[8k-180] Which of the following is NOT true about light waves?
1. The frequency of light waves is the number of complete waves that pass a point per second.
2. The frequency of visible light waves decreases from red to violet.
3. Infrared and ultraviolet radiations are invisible to the human eye.
4. Visible light consists of transverse waves of electromagnetic radiation.
5. Light waves slow down when they pass from a less dense medium to a more dense medium.
[8k-181] Which of the following is NOT true about light waves?
1. The frequency of light waves is the number of complete waves that pass a point per second.
2. The frequency of visible light waves increases from red to violet.
3. The human eye can detect ultraviolet radiation but not infrared radiation.
4. Visible light consists of transverse waves of electromagnetic radiation.
5. Light waves slow down when they pass from a less dense medium to a more dense medium.
[8k-182] Which of the following is NOT true about light waves?
1. The frequency of light waves is the number of complete waves that pass a point per second.
2. The frequency of visible light waves increases from red to violet.
3. Infrared and ultraviolet radiations are invisible to the human eye.
4. Visible light consists of longitudinal waves of electromagnetic radiation.
5. Light waves slow down when they pass from a less dense medium to a more dense medium.
[8k-183] Which of the following is NOT true about light waves?
1. The frequency of light waves is the number of complete waves that pass a point per second.
2. The frequency of visible light waves increases from red to violet.
3. Infrared and ultraviolet radiations are invisible to the human eye.
4. Visible light consists of transverse waves of electromagnetic radiation.
5. Light waves slow down when they pass from a more dense medium to a less dense medium.
[8k-184] Which of the following ray diagrams illustrates looking directly at 90⁰ through a shop window?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-185] Which of the following ray diagrams shows no refraction?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-186] Which of the following ray diagrams illustrates looking through a glass window at an angle to the 'normal'?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-187] Which of the following ray diagrams illustrates where two refraction effects cancel each other out?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-188] Which of the following ray diagrams illustrates a concave lens?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-189] Which of the following ray diagrams illustrates a diverging lens?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-190] Which of the following ray diagrams illustrates best way of obtaining the visible spectrum of colours?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-191] Which of the following ray diagrams illustrates a convex lens?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-192] Which of the following ray diagrams illustrates the lens of the eye?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-193] Which of the following ray diagrams illustrates the most common type of lens used in a microscope?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-194] Which of the following ray diagrams illustrates a converging lens?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-195] Which of the following ray diagrams illustrates a pinhole camera?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-196] Which of the following ray diagrams illustrates part of the action of a digital camera?
1. prism 1
2. prism 2
3. prism 3
4. prism 4
5. prism 5
6. non of these prisms
[8k-197] Which of the following is NOT true about sound waves.
1. Sound energy is carried by transverse waves.
2. Sound waves can be reflected just like light waves.
3. Sound waves can be refracted just like light waves.
4. The frequency of sound waves is measured in Hz.
[8k-198] Which of the following is NOT true about sound waves.
1. Sound energy is carried by longitudinal waves.
2. Sound waves cannot be reflected like light waves.
3. Sound waves can be refracted just like light waves.
4. The frequency of sound waves is measured in Hz.
[8k-199] Which of the following is NOT true about sound waves.
1. Sound energy is carried by longitudinal waves.
2. Sound waves can be reflected just like light waves.
3. Sound waves cannot be refracted like light waves.
4. The frequency of sound waves is measured in Hz.
[8k-200] Which of the following is NOT true about sound waves.
1. Sound energy is carried by longitudinal waves.
2. Sound waves can be reflected just like light waves.
3. Sound waves can be refracted just like light waves.
4. The frequency of sound waves is measured in m/s.
[8k-201] Which of the following is NOT true about sound waves.
1. Sound is less readily absorbed by a soft rough surface rather than a hard smooth surface.
2. Sound waves consist of particles being compressed and decompressed, a sort of to and fro vibration.
3. Sound vibrations can carry energy from one location to another in the direction the wave travels.
4. The bigger the amplitude or the bigger the frequency of a sound wave, the greater the quantity of energy transferred.
[8k-202] Which of the following is NOT true about sound waves.
1. Sound is more readily absorbed by a soft rough surface rather than a hard smooth surface.
2. Sound waves consist of particles being moved up and down at 90^o to the direction of travel in a sort of oscillation.
3. Sound vibrations can carry energy from one location to another in the direction the wave travels.
4. The bigger the amplitude or the bigger the frequency of a sound wave, the greater the quantity of energy transferred.
[8k-203] Which of the following is NOT true about sound waves.
1. Sound is more readily absorbed by a soft rough surface rather than a hard smooth surface.
2. Sound waves consist of particles being compressed and decompressed, a sort of to and fro vibration.
3. Sound vibrations cannot carry energy from one location to another in the direction the wave travels.
4. The bigger the amplitude or the bigger the frequency of a sound wave, the greater the quantity of energy transferred.
[8k-204] Which of the following is NOT true about sound waves.
1. Sound is more readily absorbed by a soft rough surface rather than a hard smooth surface.
2. Sound waves consist of particles being compressed and decompressed, a sort of to and fro vibration.
3. Sound vibrations can carry energy from one location to another in the direction the wave travels.
4. The smaller the frequency of a sound wave, the greater the quantity of energy transferred.
[8k-205] Which of the following is NOT true about ultrasound waves.
1. Ultrasound waves are lower in frequency than the human auditory range.
2. High pressure ultrasound can be used for cleaning surfaces.
3. Ultrasound can transfer energy through material.
4. Ultrasound waves can be reflected or absorbed by materials and can be safely used to scan an unborn baby.
[8k-206] Which of the following is NOT true about ultrasound waves.
1. Ultrasound waves are higher in frequency than the human auditory range.
2. Audibles sound, unlike ultrasound, can be used for cleaning surfaces.
3. Ultrasound can transfer energy through material.
4. Ultrasound waves can be reflected or absorbed by materials and can be safely used to scan an unborn baby.
[8k-207] Which of the following is NOT true about ultrasound waves.
1. Ultrasound waves are higher in frequency than the human auditory range.
2. High pressure ultrasound can be used for cleaning surfaces.
3. Ultrasound cannot transfer energy through material.
4. Ultrasound waves can be reflected or absorbed by materials and can be safely used to scan an unborn baby.
[8k-208] Which of the following is NOT true about ultrasound waves.
1. Ultrasound waves are higher in frequency than the human auditory range.
2. High pressure ultrasound can be used for cleaning surfaces.
3. Ultrasound can transfer energy through material.
4. Ultrasound waves can only be reflected by materials and not readily be absorbed.
[8k-209] Which is NOT true about how a loudspeaker works?
1. The electrical signal makes a diaphragm vibrate up and down.
2. The diaphragm vibrations cause the air particles to vibrate to vibrate to and fro.
3. The input source of energy is electrical.
4. The sound waves spread out in all directions at the same speed.
[8k-210] Which is NOT true about how a loudspeaker works?
1. The electrical signal makes a diaphragm vibrate to and fro.
2. The diaphragm vibrations cause the air particles to vibrate up and down.
3. The input source of energy is electrical.
4. The sound waves spread out in all directions at the same speed.
[8k-211] Which is NOT true about how a loudspeaker works?
1. The electrical signal makes a diaphragm vibrate to and fro.
2. The diaphragm vibrations cause the air particles to vibrate to vibrate to and fro.
3. The input source of energy is magnetic.
4. The sound waves spread out in all directions at the same speed.
[8k-212] Which is NOT true about how a loudspeaker works?
1. The electrical signal makes a diaphragm vibrate to and fro.
2. The diaphragm vibrations cause the air particles to vibrate to and fro.
3. The input source of energy is electrical.
4. The sound waves spread out in in a narrow beam with different frequencies travelling at different speeds.
[8k-213] Which is NOT true about how a microphone works?
1. The input source of energy is an electrical signal.
2. The sound waves make a sensitive diaphragm vibrate to and fro.
3. The diaphragm vibrations are converted to a varying electrical signal.
4. The electrical signal from a microphone can be recorded or immediately played back through a loudspeaker.
[8k-214] Which is NOT true about how a microphone works?
1. The input source of energy is a sound wave.
2. The sound waves make a sensitive diaphragm vibrate up and down.
3. The diaphragm vibrations are converted to a varying electrical signal.
4. The electrical signal from a microphone can be recorded or immediately played back through a loudspeaker.
[8k-215] Which is NOT true about how a microphone works?
1. The input source of energy is a sound wave.
2. The sound waves make a sensitive diaphragm vibrate to and fro.
3. The diaphragm vibrations are converted to a varying sound signal.
4. The electrical signal from a microphone can be recorded or immediately played back through a loudspeaker.
[8k-216] Which is NOT true about how a microphone works?
1. The input source of energy is a sound wave.
2. The sound waves make a sensitive diaphragm vibrate to and fro.
3. The diaphragm vibrations are converted to a varying electrical signal.
4. The electrical signal from a microphone can't be recorded or immediately played back through a loudspeaker.
[8k-217] Which is NOT true about how the human ear works?
1. When an object vibrates in air, an audible sound wave is always produced.
2. Sound waves cause the ear drum to vibrate to and fro.
3. The vibrating ear drum causes the ear bones to vibrate at the same frequencies.
4. The vibrating ear bones cause hairs in the cochlea to vibrate and trigger nerve signals to the brain.
[8k-218] Which is NOT true about how the human ear works?
1. When an object vibrates in air, an audible sound wave maybe produced.
2. Sound waves cause the ear drum to vibrate up and down.
3. The vibrating ear drum causes the ear bones to vibrate at the same frequencies.
4. The vibrating ear bones cause hairs in the cochlea to vibrate and trigger nerve signals to the brain.
[8k-219] Which is NOT true about how the human ear works?
1. When an object vibrates in air, an audible sound wave maybe produced.
2. Sound waves cause the ear drum to vibrate to and fro.
3. The vibrating ear bones causes the ear drum to vibrate at the same frequencies.
4. The vibrating ear bones cause hairs in the cochlea to vibrate and trigger nerve signals to the brain.
[8k-220] Which is NOT true about how the human ear works?
1. When an object vibrates in air, an audible sound wave maybe produced.
2. Sound waves cause the ear drum to vibrate to and fro.
3. The vibrating ear drum causes the ear bones to vibrate at the same frequencies.
4. The vibrating ear bones trigger nerve signals to the brain.
[8k-221] Which is NOT true about gamma radiation?
1. It is emitted from a molecule as it disintegrates into atoms.
2. It can be used to kill cancer cells in patients.
3. It can cause damage to cell DNA which can cause genetic mutations forming cancerous cells.
4. It is a very penetrating radiation and can pass deep into the human body.
[8k-222] Which is NOT true about gamma radiation?
1. It is emitted from the nucleus of an atom as it disintegrates.
2. It cannot kill cancer cells.
3. It can cause damage to cell DNA which can cause genetic mutations forming cancerous cells.
4. It is a very penetrating radiation and can pass deep into the human body.
[8k-223] Which is NOT true about gamma radiation?
1. It is emitted from the nucleus of an atom as it disintegrates.
2. It can be used to kill cancer cells in patients.
3. It is so penetrating that it does not cause damage to cell DNA and passes harmlessly through the body.
4. It is a very penetrating radiation and can pass deep into the human body.
[8k-224] Which is NOT true about gamma radiation?
1. It is emitted from the nucleus of an atom as it disintegrates.
2. It can be used to kill cancer cells in patients.
3. It can cause damage to cell DNA which can cause genetic mutations forming cancerous cells.
4. It is not a very penetrating radiation and is absorbed by the body to no ill effect.
[8k-225] Which of the following is incorrect about five types of electromagnetic radiation?
1. Infrared radiation from the sun warms our skin, but cannot cause burns.
2. Visible light triggers receptors in our eyes to give us vision, but bright light can cause eye damage.
3. Ultraviolet radiation is essential for the production of vitamin D in skin cells, but an excess can cause genetic damage forming cancer cells.
4. X-rays are potentially harmful and cause genetic damage, but low doses can be used to X-ray our bone structures.
5. Gamma radiation has the highest frequency and conveys the highest energy of these radiations and so is the most dangerous radiation.
[8k-226] Which of the following is incorrect about five types of electromagnetic radiation?
1. Infrared radiation from the sun warms our skin, but in excess can cause burns.
2. Visible light triggers receptors in our eyes to give us vision, but cannot cause eye damage.
3. Ultraviolet radiation is essential for the production of vitamin D in skin cells, but an excess can cause genetic damage forming cancer cells.
4. X-rays are potentially harmful and cause genetic damage, but low doses can be used to X-ray our bone structures.
5. Gamma radiation has the highest frequency and conveys the highest energy of these radiations and so is the most dangerous radiation.
[8k-227] Which of the following is incorrect about five types of electromagnetic radiation?
1. Infrared radiation from the sun warms our skin, but in excess can cause burns.
2. Visible light triggers receptors in our eyes to give us vision, but bright light can cause eye damage.
3. Ultraviolet radiation is essential for the production of vitamin D in skin cells, but cannot cause genetic damage forming cancer cells.
4. X-rays are potentially harmful and cause genetic damage, but low doses can be used to X-ray our bone structures.
5. Gamma radiation has the highest frequency and conveys the highest energy of these radiations and so is the most dangerous radiation.
[8k-228] Which of the following is incorrect about five types of electromagnetic radiation?
1. Infrared radiation from the sun warms our skin, but in excess can cause burns.
2. Visible light triggers receptors in our eyes to give us vision, but bright light can cause eye damage.
3. Ultraviolet radiation is essential for the production of vitamin D in skin cells, but an excess can cause genetic damage forming cancer cells.
4. X-rays are potentially harmful and cause genetic damage, but unlimited low doses can be safely used to X-ray our bone structures.
5. Gamma radiation has the highest frequency and conveys the highest energy of these radiations and so is the most dangerous radiation.
[8k-229] Which of the following is incorrect about five types of electromagnetic radiation?
1. Infrared radiation from the sun warms our skin, but in excess can cause burns.
2. Visible light triggers receptors in our eyes to give us vision, but bright light can cause eye damage.
3. Ultraviolet radiation is essential for the production of vitamin D in skin cells, but an excess can cause genetic damage forming cancer cells.
4. X-rays are potentially harmful and cause genetic damage, but low doses can be used to X-ray our bone structures.
5. Gamma radiation is very penetrating and can pass through our body without harming any cells..
[8k-230] Above are shown some observations from ripple tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a frequency of 18 Hz?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-231] Above are shown some observations from ripple tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a frequency of 26 Hz?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-232] Above are shown some observations from ripple tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a frequency of 20 Hz?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-233] Above are shown some observations from ripple tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a frequency of 32 Hz?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-234] Above are shown some observations from large scale wave tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a wavelength of 3 m?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-235] Above are shown some observations from large scale wave tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a wavelength of 2 m?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-236] Above are shown some observations from large scale wave tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a wavelength of 5 m?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4
[8k-237] Above are shown some observations from large scale wave tank experiments with transverse water waves. From the diagram, estimate which wave pattern corresponds to a wavelength of 4 m?
1. wave pattern 1
2. wave pattern 2
3. wave pattern 3
4. wave pattern 4

ANIMAL	LOWEST	HIGHEST	ANIMAL	LOWEST	HIGHEST
Sheep	100	30000	Human	64	23000
Cat	45	64000	Dolphin	200	150000
Dog	67	45000	Bat	2000	110000