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Grade 6
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Temperature, Heat, and Matter

When a solid is heated, particles rapidly as their temperature rises. Then particles break free from the holding them in place. In this process, called , solids change into liquids. If a liquid is heated, particles will escape and form a(n) . This transformation of liquid to gas is called . Particles in the gaseous state are spread out because they have freedom of . As energy is removed from gases, they turn into liquids during . Removing energy from liquids cause them to freeze, or turn into . If liquids are boiled, bubbles of escape. A substance’s doesn’t change while a change of state occurs.