1). Talk about the beginning of life on the earth.

　　2). Discuss the order of development of life.

　　Teaching difficult points教学难点

　　Understand the beginning of life on the earth.

　　Teaching methods教学方法

　　1). Task-based teaching and learning

　　2). Cooperative learning

　　3). Discussion and practice

　　4). Fast-reading, scanning and careful-reading

　　Teaching aids教具准备

　　Multimedia and PowerPoint

　　Teaching procedures & ways教学过程与方式

　　Step 1 Lead in

　　Talk about science subjects

　　T: Good morning/afternoon, everyone. What class do you have today?

　　S1: Maths, English, Chinese, physics, history, and geology.

　　T: What other subjects do you have in school?

　　S2: Computer, chemistry, biology, music, PE, and politics.

　　T: Which is your favourite? Why?

　　S3: My favourite one is ...because it's very interesting/exciting/instructive/...

　　S4: I like ...best because ...

　　T: Which ones are science subjects?

　　S5: Physics, chemistry, biology, geology and mathematics.

　　T: All these subjects play an important role in the study of science. What subjects are used to study medicine? How about biochemistry? What about geophysics? What subjects are part of astronomy?

　　S6：Mathematics and physics.

　　T: Can you understand the following combined science subjects?

　　→physics + mathematics = astronomy

　　→geology + physics = geophysics（地球物理学）

T: What does astronomy deal with?