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1、Reading and vocabularyRead the passage as quickly as you can and choose the best title for it.The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen Passage AWe can reach a conclusion that it isimportant for us to read books. It is our aim to build up a harmonious soc
2、iety. It is a piece of electrical equipment. The stone contains potassium sodiumcalcium magnesium The wheel is made of aluminum. zinc oxide Nails are easy to rust in the damp air. Water boils at 100 C. conclusionaimelectricalpotassiumsodiumcalciummagnesium aluminumzinc copperoxide rustboilsRead the
3、passage again and answer the following 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
4、 iron have a slow or fast reaction with steam? It has a slow reaction.5. Does copper react with water? No, it doesnt.Read the passage and fill in the chart. Iron in dry airIron in air-free waterIron in ordinary waterStage A(starting experiment)cotton woolwater water Passage BStage B(1 week later)Sta
5、ge C (Result)nailswater Iron does not rust Iron does not rust Iron rusts Read the passage again and complete the sentences.1. In the first part of the experiment, the _ is dry, not wet.2. It shows that iron _ when the air is dry.airdoes not rust3. In the second part of the experiment, you must _ the
6、 water to make sure there is no _ in it.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.boilairsome oilairnailairHomework 1.Learn the new words and important sentences by heart.2. Read Passage A and B and try to retell it.同学们同学们来学校和回家的路上要注意安全同学们同学们来学校和回家的路上要注意安全同学们同学们来学校和回家的路上要注意安全同学们同学们来学校和回家的路上要注意安全
