文档介绍：Unit 4
Astronomy: the science of the stars
高中英语必修三第四单元课件
How much do you know about the universe?
What are the names of the eight planets that circle our sun? What is their order from the sun?
高中英语必修三第四单元课件
高中英语必修三第四单元课件
地球 ______
木星 ______
火星 ______
水星 ________
海王星 _______
土星 ________
天王星 _______
金星 ________
Earth
Jupiter
Mars
Mercury
Neptune
Saturn
Uranus
Venus
THE SOLAR SYSTEM
高中英语必修三第四单元课件
1. How old is the universe?
2. How old is the earth?
3. Which were the first creature or plants on earth?
4. Do you know what the order for the development of plants and animals is?
Several billion years ago.
Between and billion years ago.
Very small air-breathing creatures.
Free Talk
高中英语必修三第四单元课件
Ideas about how life began
高中英语必修三第四单元课件
reading
How Life Began on the Earth
高中英语必修三第四单元课件
Fast reading
Read the passage quickly and find the main idea.
A brief introduction on how the universe developed and how life began on the earth.
高中英语必修三第四单元课件
Careful reading
Para 1:
Para 2:
Para 3:
Para 4:
Para 5:
A widely accepted theory about the formation of the universe.
The formation of the earth.
The importance of water for life.
The development of plants and animals on the earth.
The arrival of humans and their impact on the earth.
Read the passage carefully and analyse its structure.
earth, atmosphere and water
life development
human beings
高中英语必修三第四单元课件
1. What is the original earth’s atmosphere made up of?
2. Why did scientists believe water is fundamental to the development of life?
3. How did water come into being on the earth?
4. Which kind of life-being first appeared on the earth, plants or animals? Why?
5. Why were mammals different from all life forms in the past?
Answer the following questions.
高中英语必修三第四单元课件