Image85.gifQuiz 7Gwf2 on "Particle models of solids, liquids and gases"

   compress      compressed      dust      easily      expands      fast      faster      forces      hard      heated      hotter      space      spreads      vibrate      weak      widely   

1. It is difficult to a solid because there is so little between the particles.

2. Solids are usually materials because there are strong between the particles.

3a. When a solid is the particles faster and knock into each other more energetically.
3b. This causes the particles to move apart and the solid to to a slightly greater volume.

4a. Only forces hold the particles of a liquid together and so they are not strong and flow .
4b. When a coloured crystal is dropped in water, the colour slowly and this speeds up if the water is .
4c. This is because particles move when heated.

5a. The particles in a gas are spaced and so they are easily .
5b. They also move in all directions and hit each other and in sunlight you can see specks dancing.