Which word equation corresponds to photosynthesis? [9g-35]
glucose + oxygen ==> water + carbon dioxide
hydrocarbon + oxygen ==> water + carbon dioxide
water + carbon dioxide ==> glucose + oxygen
nitrogen + oxygen ==> nitrogen oxide
Which word equation corresponds to the formation of a toxic acidic gas when fossil fuels are burned? [9g-36]
coal + oxygen ==> water + carbon dioxide
hydrocarbon + oxygen ==> water + carbon dioxide
water + carbon dioxide ==> glucose + oxygen
nitrogen + oxygen ==> nitrogen dioxide
Rainwater always contains small amounts of the weakly acidic gas carbon dioxide dissolved from air. Which most likely describes what happens to the pH of rainwater when it runs over limestone rock? [9g-37]
the pH rises from 5.5 to 8
the pH falls from 5.5 to 3
the pH rises from 7 to 10
the pH falls from 7 to 7.5
Which harmful gas is reduced in car exhaust emissions by using a catalytic converter? [9g-38]
water
nitrogen oxide
carbon dioxide
nitrogen
Which harmful gas is reduced in car exhaust emissions by using a catalytic converter? [9g-39]
water
carbon dioxide
carbon monoxide
nitrogen
Which is used to treat soil which is too alkaline? [9g-40]
lime
marble
sand
peat
Which is used to treat soil which is too acid? [9g-41]
lime
marble
sand
peat
Which is believed to be the current main cause of the so-called 'Greenhouse Effect'? [9g-42]
increased volcanic activity
burning fossil fuels
reduction of the ozone layer
increase in cloud cover above the Earth
Which of the following explains the 'Greenhouse Effect'? [9g-43]
decrease in the ozone layer allows more heat radiation to reach the Earth's surface
increase in the ozone layer decreases the amunt of ultraviolet radiation the reaches the Earth's surface
increase in carbon dioxide in the atmoshere traps more heat radiation from the Earth
decrease in carbon dioxide in the atmosphere traps more allows more ultraviolet radiation to reach the Earth's surface
Which of these causes a reduction in the ozone layer? [9g-44]
increased burning of fossil fuels
increased photochemical smog in cities
increased sea temperature due to global warming
increase in the use of chemicals in refrigerators and aerosol cans
What is another term for the 'Greenhouse Effect'? [9g-45]
global warming
ozone reduction
atmospheric acidification
smog production
Which of the following is a gas emitted from factories and power stations that causes acid rain? [9g-46]
nitrogen
sulphur dioxide
carbon monoxide
hydrogen
Which of the following 'phrases' describes how pollution is reduced in the exhaust of a motor vehicle? [9g-47]
'auto ignition prevention'
'high compression ratio'
'catalytic converter'
'electronic fuel injection'
Which of these is a power station fuel, which does not produce carbon dioxide that causes the 'Greenhouse Effect' or 'global warming'? [9g-20]
coal
oil
peat
uranium
Which is a harmless colourless liquid at room temperature, formed by the combustion of a fossil fuel? [9g-49]
water
carbon dioxide
nitrogen dioxide
carbon monoxide
Which is a harmless colourless gas at room temperature, formed by the combustion of a fossil fuel? [9g-50]
water
carbon dioxide
nitrogen dioxide
carbon monoxide
Which gas in the atmosphere most contributes to global warming? [9g-51]
carbon monoxide
nitrogen
carbon dioxide
hydrogen
Which most likely provides evidence of global warming? [9g-52]
thinner growth rings on trees in Northern Europe
less rainfall in Northern Europe
an increase in the ice sheets of Greenland
butterflies breeding in more northerly latitudes than before