外研版(2019)必修第三册 Unit 3 The world of science Developing Ideas & Presenting Ideas随堂检测（含答案）

Unit 3 Developing Ideas & Presenting Ideas
1.写出下列写作常用词汇
1. _________ n.程序;步骤
2. _________ v.下结论
_________ n.结论
3. _________n.实验
4. _________ v.称重
_________ n.重量
5. _________v.实施;执行
6. _________v.点燃
7. _________adj.有能力的
8. _________n.例子;实例
9. _________adj.重要的;影响深远的
10. _________n.记述;描述v.说明;解释
2.Lastly, we weighed the piece of aluminum again, and found that the weight of the piece of aluminum did change.(把 and found...改为现在分词短语升级该句）______________________________________________________________________________
3.你要是遇上这种事故就会丧生的。
If you _________ _________ across such an accident， you _________ _________ _________ in it.
4.一块落石击中了他的头部，使得他卧床不起。
A falling stone _________ _________ _________ _________ _________, leaving him lying in bed all along.
5.这个卡通人物加了一条尾巴，看起来很好笑。
_________ a tail _________ _________ the cartoon figure, it looks ridiculous.
6.We have made _______ clear what the sentence means.
7.As we know, she is the _______(lead) role in the TV series.
8.今天你们在化学课上做了一个实验,请你用英语写一份80 词左右的实验报告。内容如下:
实验目的:检验铝在空气中加热后,重量是否会发生变化。
实验器材:铝片、本生灯(Bunsen burner)、天平(balance)、 坩埚(crucible),坩埚钳(tongs)
实验步骤:
第一步:把铝片放在坩埚中,然后放在天平上称重。
第二步:点燃本生灯,将盛有铝片的坩埚移到火焰上加热。
第三步:再称坩埚和铝片的重量。
实验结果:比加热前略重一些。
实验结论:铝在空气中加热后,重量会发生变化。
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答案以及解析
1.答案：1. procedure
2. conclude, conclusion
3. experiment
4. weigh, weight
5. conduct
6. light
7. capable
8. instance
9. significant
10. account
2.答案：Lastly, we weighed the piece of aluminum again, finding that the weight of the piece of aluminum did change.
3.答案：had come, would have died
4.答案：hit him on the head
5.答案：With, attached to
6.答案：it
7.答案：leading
8.答案： Today, we carried out an experiment in chemistry class. We did the experiment with the purpose of discovering if there is a change in weight when aluminum is heated in air. To carry out the experiment, what we need are a piece of aluminum, a Bunsen burner, a balance, and a crucible. We did the experiment following the procedures below.
Well, first, we put a piece of aluminum in the crucible. Then we put the crucible on the balance and weighed it. Next, we lit the Bunsen burner. After that, we held the crucible over the flame. Lastly, we weighed the crucible with the piece of aluminum in it again, and found that the weight of the piece of aluminum did change.
From this experiment, we came to the conclusion that when aluminum is heated in air, there is a change in weight.
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