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教学过程
复习导入1.A video：about Hawking
2.Two questions:
1).Do you think science is interesting? Why or why not?
2).Name one or two famous Chinese scientists. What do you know about them?任务导学1. To show some objects. （展示图片和实物：蜡烛、打火机、广口瓶、浅口盘、装满水的杯子）
What are they? （学生在看过图片后，教师询问，引起学生对本课新词的回忆与巩固。）
2. To do the experiment and asks Ss to make observation. Then describe the steps in English.
3. Ask some Ss to do the experiment in front of class and pay attention to the steps.
4. Ask one student to do the experiment in the front of class, the others retell steps. The teacher asks: What will happen? (The candle stops burning, The water inside the jar rises.)
5. Read and answer the questions.
Why does the water in the jar rise?
How far does the water rise? Why?
6. What is happening? Use up the oxygen.
7. Language points:（展示知识点并讲解）
1). interesting
2). carefully/careful/careless/carelessly/carelessness
3). one-fifth 五分之一
口诀：分子基，分母序，分子大于1，分母加s.达标检测1. Don’t (use up/give up)all of the ink. Leave some for me.
2. Because of his (care), he didn’t pass the final exam.
( )3. They are in the stories.
A. interested, interested B. interested, interesting
C. interesting, interested D. interesting, interesting
( )4. About of the students are boys in Class 6.
A. two three B. second three
C. two thirds D. two third拓展
延伸What should you do if you want to be a scientist in the future?小结Let’s summarize the key points and difficult points together.作业布置1. Understand the meaning of the text
2. Remember the mastery words in this lesson.
3. Finish the activity book of lesson 26
4. Preview Lesson 27课后
反思1.实验器材可准备到5-6份，分小组做实验，尽量让每个学生都参与进来。