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matter


(MAH-tur)

anything that takes up space. These balloons are made of matter. The air inside them is made of matter too!

solid


(SAHL-id)

matter that keeps its size and shape. Ice is a solid.

liquid


(LIK-wid)

matter that flows and takes the shape of the container it is in. Water is a liquid.

gas


(gas)

matter that has no shape and fills up as much space as it can. Water vapor is a gas.

sublimation


(sub-luh-MAY-shun)

the process in which a solid turns directly into a gas

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