Lesson 2 Reading 1 Label the pictures. cool fresh water freeze heat melt salt water 2 3 4 1 1 melt 3 2 2 Complete the sentences. 4 5 6 5 6 1 Water in the sea is salt water and we can't drink it. 2 Water in most lakes and rivers is and we can drink it. 3 When the temperature is below 0°, water 4 When the temperature is above 0°, ice and turns into water. 5 When you water to 100°, it changes into steam. 6 If you steam, it changes back into water.

1 Label the pictures.

• 1. melt
• 2. fresh water
• 3. cool
• 4. freeze
• 5. heat
• 6. salt water

2 Complete the sentences.

• 1. Water in the sea is salt water and we can't drink it.
• 2. Water in most lakes and rivers is fresh water and we can drink it.
• 3. When the temperature is below 0°, water freezes.
• 4. When the temperature is above 0°, ice melts and turns into water.
• 5. When you heat water to 100°, it changes into steam.
• 6. If you cool steam, it changes back into water.