Image85.gifQuiz 7Gwf3 Questions on PARTICLE MODELS of GASES, LIQUIDS & SOLIDS - Doc Brown worksheet for QCA 7G KS3 science-chemistry

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   boiling      closer      condensation      diffusion      evaporation      few      freer      freezing      further      gases      hitting      liquids      lots      melting      particle      slower      slowly      solids   

1. If something 'smelly' is spilt, the smell spreads around the room due to movement. This spreading is from where there are of 'smell' particles to where there are only a of them in the of the air.

2. This process is called and is slow because the particles are always each other

3. This process can also happen even in but cannot happen in !

4. When a gas changes to a liquid it is called and the particles come much together.

5. If a solid changes to a liquid it is called and the particles become to move.

6. The process of is when a liquid changes to solid and the particles come together.

7. The opposite of condensation is called . When this same process happens rapidly and at a fixed temperature it is called and the particles move much apart.