外研版高中英语必修一Module5Readingandvocabulary课件(2)

Lead-in What can you see in a lab? test tube test tube holder cotton wool Bunsen burner balance tongs iron nails metals • How many metals do you know in a lab? • How do they react with different substances? New words react steam（水蒸汽） heat(v) form(v) substance burn oxide equipment（设备） partial aim conclusion Read the passage and choose the best title for it. The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen (paragraph 1) (paragraph 1 and the table) ( the table) True or False • 1. Different metals have the same uses. • 2.when we use metals,knowing how they react with different substances is not important. • 3. The reaction of metals with these substances can be put into order. F F T Metals Heated in oxygen Reaction with water or steam Potassium Burn to form an oxide Reacting with cold waterSodium Calcium Magnesium Reacting with steamAluminium Zinc Iron Reacts slowly Partial reaction Copper Partial reaction No reaction The Reaction of Metals Read the table . Answer these questions. 1. Which of the metals in the table reacts the most with oxygen and water? Potassium, calcium and sodium. 2. What happens when you heat calcium in oxygen? It burns to form an oxide. 3. Which metals react with steam? Magnesium, aluminium and zinc. 4. Does iron have a slow or fast reaction with steam? It has a slow reaction. 5. Does copper react with water? No, it doesn’t. How to make a scientific experiment report ? A Simple Scientific Experiment words below (adv)（在下面 ） aim apparatus（器材） half-fill（把...装满一半 ） test tube cotton wool（药棉） bunsen burner （本生灯） B. aim D. method A. result C. conclusion Put these words in the correct order to describe the stages of a scientific experiment. • Read the introduction, aim and apparatus , then answer the questions. • 1.Introduction: • What does the scientific experiment show? • 2.Aim: • 3.Apparatus: Read the parts of green title and fill in the table. Iron in dry air Iron in air-free water Iron in ordinary water Stage A (starting experiment) cotton wool water water Stage B (1 week later) Stage C (Result) nails water Iron does not rust Iron does not rust Iron rusts Iron in dry air • Method • (1)Put…at… • (2)Push…down… • (3)Leave… • Result: After one week ,the nails have not rusted. • Conclusion: Iron does not rust in dry air. Iron in air-free water • Method • (1)Half-fill… • (2)Boil…(This makes sure…) • (3)Put…in… • (4)Add…to… • (5)Leave… • Result: After one week ,the nails have not rusted. • Conclusion: Iron does not rust in air-free water. Iron in ordinary water • Method • (1) Half-fill…and add… • (2)Leave… • Result: After one week ,the nails rust in the tube with ordinary water. • Conclusion: Iron rusts in ordinary water. 1. In the first part of the experiment, the ___ is dry, not wet. 2. It shows that iron ___________ when the air is dry. 3. In the second part of the experiment, you must ____ the water to make sure there is no ___ in it. air does not rust boil air Complete the sentences. 4. You add ________ to the water because this keeps ___ out of it. 5. It shows that ____ does not rust in water that has no ___ in it. some oil air nail air Try to make a simple experiment report: How does Magnesium react heated in oxygen? 镁条燃烧前后质量的测 定视频1_标清.mp4 Help you aim：To find out if magnesium burns to form an oxide with oxygen. Apparatus：magnesium rod 镁条 balance天平 tongs夹子 Bunsen burner本生灯 Method： （1）Weigh称重…(第一次称重) （2）Burn...（点燃镁条） （3）Weigh…（第二次称重） (4)compare比较…（比较前后两次重量的变化） Result:… heavier than… Conclusion: Magnesium burns to form an oxide with oxygen Make a simple experiment report How does Magnesium react heated in oxygen?