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Liquids, solids, gas

Key words for KS3 on topic of liquids, solids and gases. Aimed at year 7

particle a very small unit of a substance. All things are made of these.
solid an object that has a fixed shape. The particles are tightly packed together.
liquid It has a free-flowing shape. Particles are less close together. It flows to fill a container and can be poured.
gas It is free-moving. It doesn't have a shape but can fill a container. Particle are far apart.
diffusion The spreading out of gas or liquid particles in another gas or liquid or sometimes a solid.
compress to press down and squash something
flow to move freely. Water does this in a river
dissolve when a solid becomes part of a liquid. Sugar does this in warm water.
steam this is produced when water boils.
Created by: 572039803