人教版高中英语必修3Unit4reading公开课课件

11
Group work : describe the video
The earth is becoming hotter and hotter
Discussion
What can we do to prevent the earth from becoming hotter and hotter?
produced water vapour and gases
(3) What did the water vapour and gases form?
the earth’s atmosphere
(4) What appeared as the earth cooled down?
Water appeared
God created the world in seven days
Detailed reading
This text can mainly divided into two stages
Stage 1 : The development of the earth (para 1—3) Stage 2 : The development of life (para 4—5)
Stage 1: The development of the earth
(1) After the Big Bang, what was the
earth like?
a cloud of dust
a solid globe
(2) What happened next?
exploded with fire and rock
2
dust
8. Water appeared on the
9. Shellfish and other fish 4 earth
6
appeared.
10. The universe began with
11. Clever animals with
1 a “Big Band”.
12 hands and feet appeared 12. Mammals appeared.
1.Who are the small clever animals with hands and feet? 2. Are they taking care of the earth well? Why?
Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.
4 insects 5amphibians
6 forests
7 reptiles 8 dinosaurs 9 mammals
10 humans
Can you put the order of development of
life into a time line?
8 1. Insects and amphibians 10 2. Dinosaurs appeared.
3 人教版必修 Unit 4 Astronomy: the science of the stars
reading
How Life Began on the Earth
wenku.baidu.com
Pangu separates the sky from the earth
The Goddess Nuwa mended the heaven and created human beings from the clay(粘土).
water is important for the beginning of life on the earth.
Why is water so important for the beginning of life?
Because water allowed the earth to dissolve harmful gases into oceans and seas.
forests
5.What life developed after forests appeared?
reptiles appeared dinosaur developed
6.What life developed after dinosaurs? mammals on land
7. What life developed after mammals? small clever animals
Stage2 The development of life
1.What life developed after water appeared? small plants appears in water
2.What life developed in water next? Shellfish and all sorts of fish
3.What about the life on land?
green plants began to
grow on land
insects appeared
4. What life developed next on land?
amphibians on land and in the water
appeared.
3
3. The earth became a solid
ball.
5
4.Small plants grew on the water.
9
5. Reptiles appeared. 7. The earth was a cloud of
7
6. Plants began to grow on dry land.
The earth may become too hot to live on .
Can you fill in the blanks?
plants
animals
1 small plants in water
sellfish and all 2 sorts of fish
3 Green plants on land