Page 99 - ICSE Science 3 : E-book

2. How can you decide which substance is the solute and which is the
solvent in a solution?

3. Defi ne the following terms.

(a) Solute (b) Solvent (c) Solution

4. Under which conditions does a solute dissolves faster in water?

5. Diff erentiate between soluble and insoluble substances.

6. Give fi ve examples each of objects that fl oat and sink in water.

THINK AND ANSWER

1. What will happen if large quantity of solute such as salt or sugar is added in
solvent (water)? Will it dissolve faster or not?

2. Name a liquid that is insoluble in water and forms a separate layer.

TALK ABOUT

1. What makes an object sink or fl oat?
2. Discuss the properties of water.

LINK AND LEARN

Let's make lemonade. Take a glass fi lled three-fourth with water. Take help of your teacher
or mother to cut a lemon in half using a knife. Squeeze out the lemon juice into the
water-fi lled glass. Now add a spoonful of sugar to it. Stir the solution to dissolve the sugar
completely. Your lemonade is ready to drink.

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