Unit 5 Lesson 25 Let's Do an Experiment配套练习（含答案）冀教版九年级英语全册

Unit 5 Look into Science
Lesson 25　Let's Do an Experiment!
Ⅰ. 根据句意及所给提示填空。
1.Our teacher advises us to write down the c __________answers next to the mistakes.
2. Love from our family is the f __________（力量）that encourages us to work hard for the future.
3. Surprisingly, some __________（科学的）discoveries were made by accident.
4. The most important __________ （方法）of protecting the environment is to plant trees.
5. Tony and I have made up our minds to finish this __________ （实验）by ourselves.
Ⅱ. 单项选择。
6. _____the cup upside down, and you can find where it is made on the label.
A. Take B. Turn C. Bring D. Hold
7.We should take action to stop the factories from_____ waste water.
A. taking out B. jumping over C. pouring out D. coming over
8.—Anna, please_____ this bottle_____ hot water.
—OK, Mrs Miller.
A. mix; and B. fill; with C. put; off D. pour; to
9.—Will you go to the museum by bus
—I’d rather take a taxi. It’s _____.
A. busier B. harder C. cheaper D. faster
10. Shelley had prepared carefully for her physics examination so that she could be sure_____ passing it at her first attempt（尝试）.
A. by B. from C. of D. for
Ⅲ. 连词成句。
11. explain, could, it, you
____________________________________
12. keeps, in, what, sky, the, the, birds
____________________________________
13. cover, paper, the dish, with
____________________________________.
14. takes, off, cardboard, he, his, the, hand
____________________________________.
15. sure, wind, I’m, stronger, is, the
____________________________________.
Ⅳ.完形填空。
The scientific methods are the steps that scientists or the science lovers follow to answer the questions about the natural world. Scientific methods are mainly made up of these six steps.
The first step of the scientific methods is to observe（观察）things that 1 _____ you.
This is important when you are working on a scienceproject because you want your project to focus on something that draws your 2 _____.The second step is questioning. Questioning is 3 _____ to your observations. Your question should be about what you are trying to discover or conclude in your experiment. Many more questions will be 4 _____ after observations.
Supposition（假设）is a key part of the scientific process（ 过程）. In general, a supposition is an idea that is brought up to explain a natural event, a special experience, or an unusual condition, and can be tested through a 5 _____ experiment.It describes the 6 _____ of the experiment, the process of its use and the results of its prediction（预测；预判）.
Experiment is the fourth step. After supposition, you must design and do an experiment to test it. You should develop a program 7 _____ makes it very clear how you plan to do the experiment.
The 8 _____ is about what happened in the experiment. This includes writing down all the observations and data（数据）you made during the experiment.
The conclusion is the final step in the scientific method. Does the experiment support your idea If the answer is yes, that would be great. 9 _____ the answer is no, never give up.Repeat the experiment or find ways to 10_____ your program.
1. A. surprise B. build C. wake D. interest
2. A. ability B. attention C. challenge D. knowledge
3. A. related B. realized C. refused D. regretted
4. A. turned out B. put out C. poured out D. taken out
5. A. certain B. sudden C. similar D. different
6. A. purpose B. support C. suppose D. dream
7. A. who B. whose C. what D. that
8. A. result B. report C. record D. relativity
9. A. As if B. Ever since C. So that D. Even if
10. A. improve B. identify C. introduce D. include
参考答案：
一、correct；force；scientific；method；experiment
二、BCBDC
三、Could you explain it；What keeps the birds in the sky；Cover the dish with paper；He takes his hand off the cardboard；I'm sure the wind is stronger
四、DBACA ADBDA