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

小题1:How many experiments are there in the pictures?
A.Six.
B.Five.
C.Three.
D.Two.小题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, b, c
B.a, c, b
C.b, a, c
D.c, a, b小题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.小题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.