Book 3 Unit 4
Pre-reading activities
Task I. Name some important things that make the earth a place to live on.
Task II. What do you know about the “Big Bang”? Say something about it to your partners.Task III. As far as you know, what made dinosaurs disappear?
While-reading activities
Task I. Read the text and fill in the blanks in the chart below. Try to understand how life began and developed on the earth.
Task II. Read Paragraph 4 and complete the following chart showing the development of the
living things on the earth.
Task III. Read the text and combine the two halves of the sentences.
1. AtomsA. provided oxygen for the oceans and seas.
2. The earth explosion B. combined and formed stars.
3. The water on MarsC. stops the heat escaping from the earth.
4. The extremely small plantsD. could live on land and in the water.
5. AmphibiansE. produced carbon dioxide, nitrogen, water vapour and other
gases.
6. Reptiles F. suddenly disappeared and no one knows the reason.
7. Dinosaurs G. disappeared later.
8. Carbon dioxideH. mostly lay eggs to produce younger generations.
Task IV. Read the text and decide whether the following statements are True (T) or False (F).
1. The earth was in the shape of a cloud of dust after the “Big Bang”.
2. Carbon dioxide, nitrogen, water vapour and other gases formed the earth’s atmosphere.
3. The harmful gases and acids came from the oceans.
4. Reptiles came into being before amphibians.
5. Mammals gave birth to young babies and produced milk for them.
6. Life on the earth has much to do with how people look after it.
Task V. Write a summary of the text.
Post-reading activities
Task I. Discussion. What should people do to protect the earth?
Task II. Do you think human beings exist in other outer space? Give your reasons to your group members.
Task III. Imagine you are a reporter and your partner is a scientist. Make an interview on how life on the earth came into being and developed.
参考答案
Pre-reading activities
Task I. 略
Task II．略
Task III．略
While-reading activities
Task I. 1. “Big Bang” 2. dust 3. atmosphere 4. life 5. plants 6. hot
Task II. 1. fish 2. plants 3. insects 4. reptiles 5. mammals
Task III. 1-B 2-E 3-G 4-A 5-D 6-H 7-F 8-C
Task IV. 1-6 TTFFTT
Task V.
After the universe began with a Big Bang, throwing matter in all directions, Earth was just a cloud of dust. Then 4.5-3.8 billion years ago it became a solid globe of exploding fire and rock, which produced the gases of its atmosphere. As it cooled down water appeared on its surface, making it possible for tiny plants to develop and grow there, filling the oceans with oxygen and encouraging the development of other forms of life both in the sea and on land. As plants grew into forests, huge dinosaurs developed. But 65 million years ago they disappeared, allowing mammals to spread. Then 2.6 million years ago small clever mammals with hands and feet began to appear and became the most important animal on Earth. But they are not looking after Earth well and some scientists believe Earth may eventually become too hot to live on as a result. (By Ray Cama)
Pre-reading activities
Task I. 略
Task II．略
Task III．略
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