Doing experiments can be interesting, and you may try the following experiments at home. Make sure that you’ll do them with an adult.

【小題1】How many experiments are there in the pictures?

A．Six.B．Five.C．Three.D．Two.
【小題2】The following are the instructions on how to do “Step 2” in these experiments. Which one is the right order?
a. Pour 3/4 of the water away. 
b. Put a balloon on the bottle.
c. Put the bottle in a bucket of hot water. The air rises into the balloon.
A．a(chǎn), b, cB．a(chǎn), c, bC．b, a, cD．c, a, b
【小題3】What can you see in the bottle at last in Experiment A?
A．Some ice.B．Some water.
C．Some ice and water.D．A cloud and some water.
【小題4】What will happen to the balloon in “Step 3” in Experiment C?
A．It will be bigger.B．It will be broken.
C．It won’t change.D．It will be in the bottle.


【小題1】C
【小題2】B
【小題3】D
【小題4】D

解析

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