Key words for KS3 on topic of liquids, solids and gases. Aimed at year 7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| particle | a very small unit of a substance. All things are made of these.
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| solid | an object that has a fixed shape. The particles are tightly packed together.
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| liquid | It has a free-flowing shape. Particles are less close together. It flows to fill a container and can be poured.
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| gas | It is free-moving. It doesn't have a shape but can fill a container. Particle are far apart.
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| diffusion | The spreading out of gas or liquid particles in another gas or liquid or sometimes a solid.
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| compress | to press down and squash something
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| flow | to move freely. Water does this in a river
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| dissolve | when a solid becomes part of a liquid. Sugar does this in warm water.
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| steam | this is produced when water boils.
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