Section Ⅰ Introduction & Reading and VocabularyStep One ： Warming upDo you like doing scientific experiments?What should you pay attention to when you are carrying out an experiment in a lab?________________________________________________________________________________________________________________________________________________答案： Carrying out an experiment in a lab is very dangerous.You must be careful and do the experiment under your teacher’s guidance.Step Two ： Fast readingRead the two passages (P44 － 45) quickly and answer the following questions.1 ． What should we know when we use metals?________________________________________________________________________答案： We should know how metals react with different substances.2 ． What will happen to copper when it is kept in water?________________________________________________________________________答案： No reaction /Nothing.3 ． Why is oil added to the water?________________________________________________________________________答案： To keep air out of the water.4 ． What is the use of the cotton wool in the test tube?________________________________________________________________________答案： Keeping air dry.Step Three ： Careful readingRead the text (P44 － 45) carefully and choose the best answers.1 ． Which of the following metals reacts most with water?A ． Copper. B ． Iron.C ． Aluminium. D ． Sodium.答案： D2 ． According to Passage A ， which of the following reacts most easily when it is heated in oxygen?A ． Aluminium. B ． Iron.C ． Steel. D ． Copper.答案： A3 ． We can know from the experiment________.A ． how iron rusts with oilB ． iron is quite easy to rustC ． how we can prevent iron from rustingD ． how iron reacts with all the other subs...
