a. b. c.

Learning Objective: 1.1 Analysing the physical characteristics of water

Learning Outcomes: State the meaning of the freezing point of water. State the meaning of the boiling point of water. Describe the physical characteristics of water. Explain through examples the effects of impurities on the physical characteristics of

water.

1. Complete the statement below to show the meaning of the freezing point of water.

The freezing point of water is the temperature when water changes into solid at

____________oC.

2. Underline the correct answer below to show the meaning of the boiling point of water.

The boiling point of water is the temperature when water changes into (liquid / gas) at

100oC

3. The diagram below shows that water exists in three states.Label in the boxes below the three states of water.

4. Underline the correct answer to explain the effects of impurities on the physical characteristics of water

Diagram (a) Diagram (b)

Answer scheme

a. In Diagram (a), when impurities like salt is added to the ice, the temperature of the ice

(increases, decreases).

b. In Diagram (b), when impurities like salt is added to the water, the temperature of the

boiling water (increases, decreases).

a.Solid b. Liquid c. Gas

Learning Objective: 1.1 Analysing the physical characteristics of water

1. Complete the statement below to show the meaning of the freezing point of water.

The freezing point of water is the temperature when water changes into solid at 0 oC.

2. Underline the correct answer below to show the meaning of the boiling point of water.

The boiling point of water is the temperature when water changes into (liquid / gas)

at 100oC

3. The diagram below shows that water exists in three states.Label in the boxes below the three states of water.

4. Underline the correct answer to explain the effects of impurities on the physical characteristics of water

Diagram (a) Diagram (b)

a. In Diagram (a), when impurities like salt is added to the ice, the temperature of the ice

(increases, decreases).

b. In Diagram (b), when impurities like salt is added to the water, the temperature of the

boiling water (increases, decreases).