高中英语Unit4Astronomy教案新人教版必修3

Unit 4 Astronomy: the science of the stars

随堂练习

1、Do you know the following subjects?

①Medicine

Medicine is a subject that contains biology and chemistry.

②Biochemistry

Biochemistry is a subject that contains biology and chemistry.

③Geophysics

Geophysics is a subject that contains geology and physics.

④Astronomy

Astronomy is a subject which uses knowledge both from mathematics and physics.

2、Think about what you have read and make choices.

①Why was the earth different from other planets?（B）

A It produced a lot of heat.

B The water remained.

C Water disappeared.

D It was the oldest planet.

②Why was life able to develop on the earth but not on other planets?（C）

A The earth had a solid shape.

B The earth did not have harmful gases in its atmosphere.

C The water stayed on the earth but not on other planets.

D The earth was not too hot and not too cold.

③Why was it necessary for plants to grow before animals?（B）

A Animals needed plants to protect them from the sun.

B Plants provided oxygen for animals to breathe.

C Animals could hide from hunters in forests.

D It was easier for plants to grow.

④What problem is caused by human beings?

A They exist everywhere on the earth.

B They cause global warming.

C They find new methods of growing crops.

D They enjoy hunting and fishing.

2、Can you put the order of development of life into a time line? Use the reading

to help you.

A insects and amphibians appear ⑦

B a solid ball ②

C reptiles appear ⑧

D a cloud of dust ①

E shellfish and other fish appear ⑤

F dinosaurs appear ⑨

G small plants grow on the water ④

H plants begin to grow on dry land ⑥

I presence of water ③

J mammals（including humans）appear ⑩

3、Answer the following questions.

①Why is it wrong in films and stories to show dinosaurs and people together?

Dinosaur died out long before human beings developed on the earth.

②Why do you think that humans are the cleverest animals on the earth?

They are the cleverest animals because they have larger brains than any other creatures on the earth so far.

课堂笔记

1、It exploded loudly with fire and rock, they were in time to produce the water

vapor, ...

地球猛烈的爆炸喷出了烈火和岩石，最终产生了水蒸气、……

in time=sooner or later迟早=not late or without delay（on time准时）

①Good luck to him, the doctor arrived there in time and the boy was saved.

幸运的是，医生及时赶到，男孩得救了。

②You’ll understand it in time.（=sooner or later）

你迟早会明白这件事的。

*be to do常用来表示不可避免将要发生的事或必须要做的事。

①This discovery was to have a major effect on the treatment of heart disease.

这个发现对心脏病的治疗产生了重大影响。

②Mr. Clark said to his daughter, “You are to be home by 10 o’clock at the latest.”

克拉克先生对他的女儿说，“你必须在10点以前到家。”

③I was（about）to leave when my uncle came in.（此时be to do=be about to do）

我正要出发，这时叔叔进来了。

2、It allowed the earth to dissolve harmful gases, which had become part of the