高中英語(yǔ)module5alessoninalab第一課時(shí)課件外研版必修1-wenkub
2022-11-28 17:00:38 本頁(yè)面
【正文】 r out of it. 向水里加一些油因?yàn)檫@可以防止空氣進(jìn)入到水 中。 Read passage A carefully and answer: ? 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? Potassium, calcium and sodium. It burns to form an oxide. Magnesium, aluminium and zinc. It has a slow reaction. No, it doesn’t. Passage B : Some important words about the experiment: ?apparatus (儀器 ,設(shè)備 ) ?holder (臺(tái)、架等 )支持物 , 固定器 ?cotton wool 棉絮 ?bunsen burner本生燈 （煤氣噴燈） Iron in dry airPut/ push/ leave Iron in airfree water Halffill/boil/ make sure/ put/ add/keepout of Iron in ordinary waterHalffill and add/ leave Stage A (Starting experiment) Stage B (1 week later) Stage C (Result ) ____________ ______________ ______________ nails nails nails nails nails nails ______ ______ ______ ______ ______ ______ ______ ______ cotton wool cotton wool Iron doesn’t rust Oil layer water Oil layer water Iron doesn’t rust water water Iron rusts ? Consolidation 1 Answer these questions in groups of four. 1) In the first part of the experiment,what is the use of the cotton wool in the test tube? 2.) In the second part ,what is there on the surface of the water in the test tube? 3) What is the use of the oil? 4) Why are the nails in the test tube with ordinary water rusty? There is oil on the surface of the water in this test tube. The oil can keep air out of water. The cotton wool can keep air dry. Iron reacts with oxygen in ordinary water and forms rust. Let’s do a simple experiment to test if magnesium can burn in the air and write a short report: Aim: Methods: Result: Conclusion: To find out if Magnesium burns in the air 1)use a pair of tongs to pick up some magnesium 2)light it Magnesium is burning with a bright flame in the air Ma
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