1. Watch the unit 5 review video:
1. Do the next exercises:
1. Read and complete the text:
Matter can be invisible, but it takes up _____________ . For example, air
occupies space so it is matter. Each type of matter is a ____________. Water,
Wood and air are all substances. Matter exists in three states as __________,
_________________ and gases. We can see liquids and solids, but normally we
cannot see________________ .
2. Write solid, liquid or gas. Then,
circle the right answer.
3. Match the terms with the changes of
states. (SOLIDIFICATION, MELTING, CONDENSATION, EVAPORATION)
A. Solid to liquid_____________
B. Liquid to gas _____________
C. Gas to liquid ____________
D. Liquid to solid __________
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