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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, cB.a, c, bC.b, a, cD.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.

小题1:C
小题2:B
小题3:D
小题4:D
短文属于图表类阅读。实验空气遇冷遇热的变化。
小题1:细节理解题。从图片中可以看出,共有三个实验。
小题2:综合理解题。通过认真看图分析,可以得知。实验A的第二步是倒出一些水,以便于有形成云的足够的空间;实验B的第二步是把瓶子放在热水中,以便于使瓶中的空气遇热上升进入气球;实验C的第二步是把气球放在瓶子上。
小题3:细节理解题。从实验A的第④步“…there is a cloud”可以看出瓶中产生了云,当然里面还有原来的水。
小题4:推理判断题。因为“cold air falls”可知,瓶中的空气遇冷要下降,气球也随之下降进入瓶中。
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