1、Module 5A lesson in a labWhen we have a chemical class,the teacher will show us some substances.Do you know what they are?Sodium(钠)Calcium(钙)Magnesium(镁)Aluniniu（铝）Zinc（锌）Iron（铁）Copper（铜）If you lack some kinds of microelement,which food should you eat?Iodine DiscussionIts interesting to do an experi
2、ment,but weve got a lot of things to do before an experiment.Do you know how we can carry out an experiment successfully?First,we should be clear about the aim of the experiment,the apparatus we need and how we can carry it out(we call it“method”).We watch whats happening and get the result.Lastly i
3、t is important to have a discussion on the result of the experiment.Dont forget to write down the conclusion.Fast Readingp The Different Uses of Metalsp The Reaction of Metalsp The Reaction of Metals with OxygenRead Passage A and choose the best title for it.Detailed Reading1.What should we know whe
4、n we use metals?2.Which metal reacts most with water,potassium or iron?It is important to know how they react with different substances.Potassium reacts most with water.3.What happens when you heat calcium in oxygen?4.Which meals reacts with steam?It burns to form an oxide.Magnesium,aluminium and zi
5、nc.5.Does iron have a slow or fast reaction with steam?6.Does copper react with water?It has a slow reaction.No,it doesnt.Can we put nails in wet air?Read Passage B and do this true or false questions.FTF1.Iron rusts easily in dry air.2.To make sure theres no air in the water,you have to boil the wa
6、ter for 3 minutes.3.We dont know whether iron rusts in ordinary water.Read the passage and complete the table.cottonwoolnailsIron does not rust.waterIron doesnot rust.waterwaterIron rusts.Free Talk Do you think it is easy or difficult for you to carry out a scientific experiment well?And can you describe how to do it successfully in simple words?If you want to learn science subjects well,what qualities do you think you should have?careful/serious/diligent/patient/thoughtful/
