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外研版英语必修一课件:Module5 A lesson in a lab reading(共21张PPT)


Reading Passage A electricity [,ilek'tris?ti] n.电 electrical [i'lektrik(?)l] equipment 电器设备 react vi. (化学)反应 reaction n. 反应 oxide ['?ksaid] n.氧化物 steam n. 蒸汽, 水气 The best title for Passage A ? The Different Uses of Metals ? The Reaction of Metals ? The Reaction of Metals with Oxygen 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. liquid, expand, contract, substance, mixture, react, burn, oxide, sodium We are living in a world made of different kinds of _____________. substances Some of them exist in the form of solid, liquid and some gas. Some some in the form of _________ belongs to the metal family such as calcium, zinc and _________. sodium Most of these substances can _________ react with water and can rust(生锈) after being put in water for burnt some time. When metals are _____________ in the air you oxide is produced. Also metals will find some ____________ expand when it is very hot and __________ ____________ contract when it is rather cold. Finally, if you put different substances mixture together, a ______________ is formed. How interesting it is! ?Mg ?Fe ?Ca ?Al ?Cu ?Zn ?Na ?K Magnesium ? Iron ? Calcium ? Aluminium ? Copper ? Zinc ? So


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