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E XE R C I S E

A. Tick () the correct answer.
1. In solid, particles are packed very closely/loosely.
2. Solids/Liquids have definite shape and volume.
3. Air is a liquid/gas.
4. Heat/Freezing can change solids into liquids.
5. The liquid in which solute gets dissolved is known as solvent/solution.

B. Complete the given sentences.
1. If ice is heated, it changes to water. This change is called _______________.
2. If water (liquid) is heated until it boils, it changes to _______________.
3. Most solids melt into liquid when _______________.
4. _______________ freezes into a solid when it is cooled.
5. The liquid that we get by mixing _______________ is known as the solution.

C. Explain the following processes with an example.
1. Evaporation
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2. Condensation
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3. Freezing
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