人教高中英语必修3 Unit4 Unit 4 Astronomy: the science of the stars Reading （共24张PPT）

(共24张PPT)
人教版高中英语必修三

Unit4 Astronomy:the science of the stars

Reading
How life began on the earth













Learning aims:
To understand the passage fully.
To know the beginning of the earth and life.
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How Life Began on the Earth
part1
part2
para1
para2
para3
para4
para5
A. The formation of the earth
B. The importance of water for life
C. A widely accepted theory about the formation of the universe.
D. The arrival of humans and their impact on the earth.
E. The development of plants and animals on the earth.
Fast reading
The development of the earth
The development of life
Careful reading
Para1
what is the widely accepted theory about how the earth began?

Para2
After the “Big Bang”, what happened to the solid globe next?

Para3.
what did the water do?



para4
Try to use only one sentences to describe the pictures.
Insects and amphibians appeared.
Dinosaurs appeared.
Small plants grew on the water.
Plants began to grow on dry land.
Reptiles appeared.
Shellfish and other fish appeared.
Mammals appeared.
Sentences:
Picture1: Insects and amphibians appeared.
Picture2: Dinosaurs appeared.
Picture3: Small plants grew on the water.
Picture4: Plants began to grow on dry land.
Picture5: Reptiles appeared.
Picture6: Shellfish and other fish appeared.
Picture7: Mammals appeared.

answers: 3 6 4 1 5 2 7
3. Small plants grew on the water.
6. Shellfish and other fish appeared.
4. Plants began to grow on dry land.
1. Insects and amphibians appeared.
5. Reptiles appeared.
2. Dinosaurs appeared.
7. Mammals appeared.
Para5 True or false
1. Human beings produce too much carbon dioxide which causes the global warming on the earth. ( ）
2. According to the scientists, the earth will become hot which is suitable for our living.
( )

T
F
Listen to the text and think about the question.
How many clues in the passage?
Global Warming
What should we do to prevent global warming?
Using less hot water to save energy.
Turning off all the useless power to save electricity.
Using less cars, riding more bikes, taking buses and walking
Planting trees
Recycling
Using shopping bags instead of plastic bag
……………
Only to obey nature in toder to overcome nature. – Darwin



只有遵循大自然的规律才能够战胜它。
——达尔文
Homework:
Read and try to retell the passage.
Underline all the noun clauses.