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 soci
2、ety.It is a piece of electrical equipment.The stone contains potassiumsodiumcalcium magnesium The wheel is made of aluminum.zinc oxideNails are easy to rust in the damp air.Water boils at 100 C.conclusionaimelectricalpotassiumsodiumcalciummagnesium aluminumzinc copperoxiderustboilsRead the passage a
3、gain 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 iron have a slow
4、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)Stage C(Result)nailswater
5、Iron does not rustIron does not rust Iron rustsRead 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 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 2.sentences by heart.3.2.Read Passage A and B and try to 4.retell it.
