Reading and vocabulary教学内容分析

Reading and Vocabulary Passage A Step 1 Warming up Show Ss the picture of a lab, and then ask them to answer the following questions. 1.Are you interested in doing scientific experiments? 2.Suppose you want to do a chemical experiment about some metals, do you think it is necessary to know about how they react with other substances? 3.In order to carry out an experiment successfully,what should you prepare for it? Step 2 Pre-reading Show Ss some pictures of metal, and then ask them what is it and what can it be used for?

⑴potassium

⑵sodium

⑶calcium

⑷magnesium ⑸aluminium

⑹zinc

⑺iron

⑻copper Step 3 Detail reading Ask the students to read passage A and answer the following questions. 1.Which of the metals in the table reacts the most with oxygen and water? 2. What happens when you heat calcium in oxygen? 3. Which metals react with steam? 4. Does iron have a slow or fast reaction with steam? 5. Does copper react with water? Suggested answers: 1. Potassium, calcium and sodium. 2. It burns to form an oxide. 3. Magnesium, aluminium and zine. 4. It has a slow reaction

5. No, it doesn’t. Step 4 Post-reading Read the passage again and choose the best title for it. A. the different uses of metals B. the reaction of metals C. the reactions of metals with oxygen Suggested answers : B Passage B Step 1 Pre-reading Put the words in the correct order to describe the stages of a scientific experiment. conclusion

aim

result

method

Step 2 Detail reading Read the passage carefully and answer the following questions. Can you guess the meaning of the word “apparatus” through the context?

Have you known all of the apparatuses of this experiment? In the second part of the experiment, why must you boil the water? Why do you add some oil to the water? What’s the aim of the experiment? What equipment do we need in order to do the experiment? How long does it take to see whether iron rusts in the three cases? How can we take the air out of water? How can oil prevent air entering water? Step 3 Post Reading Read the passage again to further understand it. Then work in pairs to fill in the blanks on page 45. Step 4 key points 【词条1】expand，contract 【课文原句】When you heat a metal, it expands. When you heat a metal, it contracts.

【点拨】expand和contract是一对反义词。expand在本句中的意思是“在面积上扩张、膨胀”，

contract则表示“（使）缩小，缩短”。再如：

A balloon expands when it is blown up. “I will” can be contracted to “I’ll”.

【词条2】react

【课文原句】When we use metals, it is important to know how they react with different substances…

【点拨】react在本句中的意思是“（化学）反应”。react with sth.表示“与……起化学反应”。

如：

Iron reacts with water and air to product rust. 【拓展】（1）react还有“作出反应；回应；反对；反抗”的意思。如：

The rise of oil costs reacted on the price of food. The little child reacted against my suggestion. Most of the people react positively to a suggestion.

(2) react是由“re- +act”构成的，前缀re-可以加在名词或动词前面，构成新的名词或动词。

re-通常含有三个意思：

表示“回；向后”。如：return（回来），recall（回忆）；

表示“再；重新”。如：review（复习），restart（重新开始）；

表示“相反”。如：renew （重新），reproduction（再生产）。

【词条3】conclusion 【点拨】conclusion在本模块中表示“（试验等的）结论”的意思。表示“得出结论”可用come to the conclusion, reach the conclusion, lead to the conclusion。再如：

New evidence might lead to the conclusion that we are wrong. It’s very difficult to reach the conclusion because we know little about that plan.

【拓展】conclusion作名词时还有“结束；结尾”的意思。in conclusion 表示“最后”如：

The conclusion of the book is worth to read. In conclusion, I really like this novel very much. 【短语1】

keep…out of

【课文原句】This will keep air out of the water.

【点拨】keep out (of sth.) 在本句中的意思是“使……不进入”。再如：

Keep that dog out of my garden!

【拓展】与keep有关的常见搭配有：

keep away (from sb. / sth.)“避免接近；远离”；keep sb. / sth. off“使……不接近”；keep in touch with sb.“与某人保持联系”。如：

Be careful! Keep away from the edge. Keep off the grass. I keep in touch with my American friend all the time. Step 5 Homework: 1.Write a complete scientific experiment report in simple English. 2.Preview the usage of degrees of comparison.