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
picture? 2.What other words can you think of when you look at the picture? Bunsen burner
test tube tube holder
? science -scientific experiment
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
? 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 magnesium aluminium zinc iron Burns to form an oxide
Reacting with cold water Reacting with steam
3.Practice：Ask and answer in pairs
1. Which metal reacts the most with oxygen and water? Potassium. 2. What happens when you heat calcium in It burns to form an oxide. oxygen? Magnesium, 3. Which metals react with steam? aluminium,zinc 4. Does iron Slow. a slow or fast reaction with have steam? No, it doesn’t. 5. Does copper react with water?
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
An Experiment Report Aim 1. __________: Apparatus 2. __________: Method 3. __________: (1) (2) Result (3) Conclusion 4. __________: 5. __________:
conclusion, method, result, aim, apparatus
Passage B Task: Write an experiment report
Can we put iron nails in wet air?
1.Scan ning ? Right or wrong.
1. Iron rusts easily in dry air.
2. To make sure there’s no air in the T water,
you have to boil the water for 3 minutes.
3. We don’t know whether iron rusts in
? 1. Fill in the form on P45.
? 2. Jigsaw reading & Fill & Act
3.Jigsaw （线索）reading & Fill & say
To find out if...
Apparatus 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
(3) half-fill...with, add, leave...for
After a week, rust ( not ) rust in
sentences ? In the first part of the experiment, theair ____ usingshows that we___________ in dry doesn’t rust is dry. It what iron learnt
boil air. make sure ? In the second part, you must _____ the Adding keep water to ______ _______ that there is no nails air-free air in it. ______ some oil to the water can ______ the air out of it. It shows that _____ half-fill ordinary don’t rust in ____________ water. ? In the third part, _______ the tube with water. It shows that they rust in _________ water.
? 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 …
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
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
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 _______(run). running
Homework : write a simple experiment report about potassium reacts with cold water
to find out if potassium reacts with cold water.
Apparatus a breaker, cold water, a spoon, potassium Method (1)Half-fill the container with cold water. (2) Put a spoonful of potassium into the water. The potassium burns. Conclusion Potassium reacts with cold water. Result
Thank you very much!
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