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Module5 A lesson in a lab-reading 课件 (外研版必修1)


Module5

A lesson in a lab

1)Learn some new words and phrases about science 2)learn some knowledge about science 3)To improve ss’reading skill 4)Learn to write a science report

Learning Aims

1.What can you see in the picture? 2.What other words can you think of when you look at the picture?

Bunsen burner

test tube tube holder

? science -scientific experiment

apparatus equipment

tongs

balance

crucible

beaker烧杯 & glass rod玻棒

Watch & say

metal: potassium钾
? burn ? react with cold water

? form (new substance)

GW: Match names of metals to pictures

aluminium copper

iron calcium

zinc sodium

potassium magnesium

Passages A

1.Fast-reading
? Qs: 1. What should we know when we use metals?

It is important to know how they react with different substances.

2.Here is a table with the metals that react most at the top,and react least at the bottom.
Metal Heated in oxygen Reaction with water and steam

potassium sodium

calcium

Reacting with cold water
Burns to form an oxide Reacting with steam

magnesium aluminium zinc

iron

Reacts slowly

Partial reaction

copper

Partial reaction

No reacton

3.Practice:Ask and answer in pairs
1. 2. 3. 4. 5. Which metal reacts the most with oxygen and water? What happens when you heat calcium in oxygen? Potassium. Which metals react with steam? Does iron have a slow or fast reaction with steam? It burns to form an oxide. Does copper react with water? Magnesium, aluminium,zinc

Slow. No, it doesn’t.

1.For what purpose does the author show the table (within 10 words)
2.Which sentence in Passage A can be replaced by the following one? Using metals, we should know how the metals change when they’re mixed with other substances. 3.Translate the following sentence into Chinese Here is a table with metals that react most at the top, and the metals that react least at the bottom 4.Choose the best title for the passage. A The Different Uses of Metals B The Reaction of Metals

4.体验高考Answer the questions according to the Passages A

1.For what purpose does the author show the table (within 10 words) To show how different metals react with different substances.

2.Which sentence in Passage A can be replaced by the following one? Using metals, we should know how the metals change when they’re mixed with other substances.
When we use metals, it is important to know how they react with different substances.

3.Translate the following sentence into Chinese. Here is a table with metals that react most at the top, and the metals that react least at the bottom.
这里有一个表格, 反应强的金属在上 面, 反应弱的在下面。

4.Choose the best title for the passage. 1. 2. 3. The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen

Put these words in the correct order to describe the stages of a scientific experiment
? Conclusion aim result method

aim

Method

Result

conclusion

conclusion, method, result, aim, apparatus
An Experiment Report 1. __________: Aim 2. __________: Apparatus 3. __________: Method (1) (2) (3) 4. __________: 5. __________: Result

Conclusion

Passage B Task: Write an experiment report Can we put iron nails in wet air?

rust

1.Scanning
? Right or wrong.

F

1. Iron rusts easily in dry air. 2. To make sure there’s no air in the water, you have to boil the water for 3 minutes.

T

3. We don’t know whether iron rusts in ordinary water.

F

2.Detailed-reading
? 1. Fill in the form on P45.
? 2. Jigsaw reading & Fill & Act

3.Jigsaw (线索)reading & Fill & say
Aim Apparatus

To find out if... Iron nails, test tubes, oil, tube holders, cotton wool, Bunsen burner (1) put...at the bottom of; push...down leave...for (2) half-fill...with..., boil, put, add...to, keep...out of, leave...for

Method

(3) half-fill...with, add, leave...for
Result Conclusion

After a week, rust ( not ) rust in

Complete the sentences ing what we learnt

? In the first part of the experiment, the ____ is dry. It shows that air iron ___________ in dry air. doesn’t rust ? In the second part, you must _____ the water to ______ boil _______ that there is no air in it. ______ some oil to the water make sure can ______ the air out of it. It shows that _____ don’t rust in Adding keep ____________ water. nails ? In the third part, _______ the tube with water. It shows that air-free they rust in _________ water.

half-fill ordinary

? Do you like doing scientific experiments? ? What should you pay attention to (注意) when you are carrying out an experiment(做 实验) in a lab?

6Language points

1.react with sth. to sth.

化学反应 反应

eg. An acid can react with a base to form a salt. How did your mother react to the news?

2.put sth. in order in order of … in order to do sth.

按顺序排列 按…的顺序排列 为了做某事

3. at the top of … at the bottom of …

3.make sure

of sth. that clause eg. I made sure of his arrival. You’d better make sure when and where the meeting will be held.
把… 加入 … 增加 加起来 总计是

4.add… to … add to add up add up to

5.think 短语小结:
考虑 think about think over 仔细考虑 think of …as… 把……看作…… think out 想出来, 想清楚 think highly/much of 看重 think lightly/little of 轻视

____ and you’ll have a good idea. A. think it over B. think over it C. thinking of it D. if you think about it

6.leave
1. 他把衣服忘在操场上了。
He left his clothes on the playground.
2.Who left the door open / closed 开/关)? ___________(

Who left the lights _____(亮着)? on 3. Leave the girl where she is.
4. Just leave the engine running _______(run).

Homework : write a simple experiment report about potassium reacts with cold water
Aim
Apparatus Method

to find out if potassium reacts with cold water.

a breaker, cold water, a spoon, potassium (1)Half-fill the container with cold water. (2) Put a spoonful of potassium into the water.

Result Conclusion

The potassium burns. Potassium reacts with cold water.

Thank you very much!

Bye-bye


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