II．核心素养

1. Enable students to learn the effect of gravity on the spaceship and be able to judge ideas and opinions and creatively express their views.

2. Stimulate students' interest in astronomy.

3. Enable students to think critically.

4. Develop students' ability in self-oriented acquisition.

III．教学重难点

　　How to train the students' speaking, reading and writing abilities

　　T: We have learnt a lot about astronomy, have you got interested in it? If you are going to study astronomy, what problem will you face most?

　　S2:Gravity.

　　T: What is gravity?

　　S3: Everything will fall back to the earth if it is dropped or thrown away. The pull of the earth is called gravity.

　　T: Quite right. Who first got the idea of gravity?

　　S4: Isaac Newton.

　　T: How did he get the idea?

　　S5: One day he was sitting under the tree. He saw an apple fall, which made him get the idea. Besides Newton, are there any other scientists who made a great contribution to the idea of gravity?

　　S6: Albert Einstein, Stephen Hawking.

　　T: How did each of them think of gravity? Or did they share the same idea of gravity? Come on, the tape will tell you.

　　Step 2 Listening

　　1. Listen to the tape and choose the best main idea of the listening passage (Ex.2 P30).

　　Main idea: ① I heard about how three men made mistakes when they tried to describe gravity.

② I heard about how three men wanted to find out about the beginning of the universe.