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Exercises of Pupil’s Book
2 Look and say
- float
- sink
- If you put metal in water, it sinks.
- If you put wood in water, it floats.
- If you put glass in water, it sinks.
- If you put plastic in water, it floats.
- If you put paper in water, it floats.
3 Ask and answer
Suggested question and answers
Q: What happens if you put the coin in water?
A: It sinks.
Q: What happens if you put the ball in water?
A: It floats.
Q: What happens if you put the crayon in water?
A: It floats.
Q: What happens if you put the ring in water?
A: It sinks.
Q: What happens if you put the boat in water?
A: It floats.
Q: What happens if you put the car in water?
A: It sinks.
5 Read again and answer
- What do you need for the experiment?
You need a plastic bottle, a balloon and a bowl of hot water.
- Do you put the balloon in the bottle?
No, you don’t. You put the balloon over the top of the bottle.
- Do you put the bottle in a bowl of cold water?
No, you don’t. You put it in a bowl of hot water.
- Why does the balloon inflate?
The balloon inflates because the warm air goes into the balloon and rises.
- How do hot air balloons work?
Hot air balloons rise because the warm air inside the balloon rises.
8 Listen again and order the pictures
- a
- c
- f
- b
- d
- e