1. How did the earth begin?

Para2:

1. What appeared after the ‘Big Bang”?

2. What is more important?

Para3:

1. Why was the earth different from the other planets?

Para4:

1. Why did the plants grow before the animals came?

2. Why is it wrong to show films with dinosaurs and people together?

Para5:

1. What does the “small clever animals with hands and feet” refer to?

2. What problem is caused by these animals?

随堂检测

Task1. Finish the chart using the phrases below :

1. ____________ → 2. ____________

3. ____________ → 4. ____________

5. ____________

6. ____________ → 7. ____________

8. ____________

9. ____________

A: small plants in water B: shellfish and all sorts of fish

C: green plants on land D: insects(on land)

E: amphibians(on land and in water) F: forests

G: reptiles(on land) H: dinosaurs(on land)

I: mammals(on land)

Task2. Retell the passage.

After the “Big Bang”, the earth was just a cloud of dust. It exploded with the fire and rock, which 1.___________produced water vapour and all kinds of gases and formed the earth’s 2.______________.

As the earth 3._______________, water began to appear on its surface. Water staying on the earth allowed the earth to 4.___________harmful gases into the oceans and seas. That made it possible for life to develop.

Later small plants began to grow. They 5.____________and filled the oceans and seas with oxygen, which encouraged the development of early shellfish and all sorts of fish.

Later the first green plants appeared on land, followed by land animals. When dinosaurs disappeared, mammals became more important. They gave 6.__________to their babies.

Small clever animals, now spread all over the earth. But they are not taking good care of the earth. The earth may become 7._________hot for the lives to live on, because they are putting too much carbon dioxide into the atmosphere, which 8.__________heat 9.__________escaping from the earth into space. Whether life will continue will 10._____________ whether this problem can be solved.

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