外研 高一英语 BOOK1 Module5 A_lesson_in_a_lab.ppt

句型：It is + adj. + (for sb.) to do sth. （对某人来说）做某事是…… 翻译： 每天锻炼很有必要。 It is necessary to take exercise every day. 对我们来说，学好英语很重要。 It is important for us to learn English well. Different metals have different uses, for example , steel is used in cars, and iron is used in electrical equipment. 2. What should we know when we use metals? When we use metals, it is important to know how they react with different substances, for example, water and oxygen. (1) React with … 与…产生化学反应 翻译： 很多化学(chemical)物质和氧气反应。 Many chemical substances react with oxygen. (2) React to… 对… 做出反应，反应 我们的眼睛会对光做出反应。 Our eyes react to light. Para.2 half-fill...with..., boil, put, add...to, keep...out of, leave...for para3. half-fill...with, add, leave...for A lesson in a lab Module5 Learning Aims Learn some new words and phrases about science 2）learn some knowledge about science 3）To improve ss’reading skill 4)Learn to write a science report Match names of metals to pictures. potassium sodium calcium magnesium aluminium zinc iron copper Passages A Free talk Qs: 1. Can you imagine a world without metals? It is hard to think of a world without metals. Why? Different metals have different uses, for example , steel is used in cars, and iron is used in electrical equipment. 形式主语 真正主语 It is hard to think of a world without metals. steel iron Retell electrical equipment 3.The reaction of metals with these substances can be put in order. Here is a table with the metals that react most at the top, and react least at the bottom. Metal Heated in oxygen Reaction with water or steam Potassium Burns to form an oxide Reacting with cold water Sodium Calcium Magnesium Reacting with steam Aluminium Zinc Iron Reacts slowly Partial reaction Copper Partial reaction No reacton Put… in order 把… 按顺序排好 把房间里所有东西整理好。 Put everything in the room in order. 4.Practice：Ask and answer in pairs Which metal reacts the most with oxygen and water? What happens when you heat calcium in oxygen? Which