英语：Module5《A Lesson in a Lab》Period 4课件（外研版必修1）.ppt

请根据下面表格中的内容，写一篇100词左右的短文，说明整个实验的操作过程。 一、审题谋篇 1. 时态：一般现在时 2. 人称：第 二 人称 3. 结构: ①开篇说明实验的目的。 ②接着说明所用实验用品。 ③实验方法和实验过程是重点内容，把握好写作顺序。 ④最后呈现实验结果和结论。结论部分一般要写明引起结果的原因。 二、联想本单元所学与实验有关的词汇和句型 1. 词汇： ① aim 目标 ② carry out 执行；实施 ③ react 反应 ④ boil 煮沸 2. 句型：（仿写） ①Boil the water for three minutes. 把鸡蛋煮约15分钟。 Boil the egg for about 15 minutes. ②Put two or three clean nails in the water. 把鸡蛋放进杯子里。 Put/Place the egg in the glass. ③Potassium burns to form an oxide. 两种物质反应生成二氧化碳。 The two substances react to form carbon dioxide. 三、经典句型积累 1. The aim of the experiment is to. . . 2. To carry out the experiment, you need the following things. 3. Leave the egg in the vinegar for 24 hours. The aim of the experiment is to move the shell from an egg without breaking the egg. To carry out the experiment, you need the following things: a glass, a small saucepan, water, an egg and about 250ml vinegar. When all these things are ready, you can begin the experiment. First, boil the egg for about 15 minutes in the saucepan filled with water. Next, place the egg in the glass and cover it with the vinegar. After that, leave the egg in the vinegar for 24 hours. 24 hours later, you can see the shell disappear completely. The egg shell disappears because it is made of calcium carbonate and the vinegar is an acid. The two substances react to form carbon dioxide. Ⅰ. 用所给词的适当形式填空 1. I’m glad to see so many teaching facilities (facility) in our school. 2. In China, people are supposed (suppose) to travel on the right. 3. To everyone’s astonishment (astonish), he won the first place in the competition. 4. Usually, there are several departments (depart) in universities. 5. Would you please shorten (short) the sentence for me to understand? 6. These days, professor Li is busy giving lectures (lecture) in all kinds of schools. Ⅱ. 完成句子 1. I never used to enjoy science, but last year I changed schools, and the sci