unit4-astronomy-the-science-of-the-stars-reading

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Unit 4 Astronomy:

the science of the stars

教学目标设计

1.知识目标 掌握重点词语：theory, atom, billion, globe, violent, carbon, atmosphere, fundamental, harmful, acid, multiply, oxygen, exist, prevent,以及文中重点句型。

2. 能力目标 能够根据课文时间顺序讲述地球生命的起源，在阅读过程中提高阅读技巧和阅读 。

3．情感与态度目标 提高小组合作意识，认识人类活动对地球造成的不良影响，提高环保意识，增强社会责任感，激发学生探索自然奥秘的热情。

1. ______ of the earth surface is covered by water.

A. 20% B. 30% C. 50% D. 70%

2. How many planets are there in the Solar System?

A. 6 B. 7 C. 8 D. 9

3. How long does the rotation (自转) of the earth take?

A. 12 hours B. 24 hours C. a month D. 365 days

small quiz

4. Which continent is the smallest?

A. Africa B. North America

C. South America D. Oceania

5. On what day is the Earth day celebrated?

A. April 22 B. May 4 C. August 21 D. November 11

6. Look at the pictures and give each planet their Chinese name.

1. How did the earth and human beings come into being?

2. Do you know what the earth was like before life appeared on earth?

Thinking

Pangu separated the sky from the earth.

盘古开天地

Nvwa made humans.

女娲造人

God created the world and human.

上帝创世论

How

life began

on the earth

Science: The Big Bang（大爆炸）

The universe began with a “Big Bang ”

fast reading

Para. 1 Formation (形成) of the earth.

Para. 2 The importance of water for life.

Para. 3 A widely accepted theory about

the formation of the universe.

Para. 4 The arrival of humans and their

impact on the earth.

Para. 5 The development of plants and

animals on the earth.

Match

Detailed-reading

Stage 1 :

The development of the earth (para ___ — ___ )

1. When did the “Big Bang “happened?

2. What the earth was like after the “Big Bang”?

3. What made up the earth’s atmosphere after the earth exploded?

4. How did water come into being on the earth?

Stage 2 :

The development of life (para___ — ___ )

1. What’s the significance of the presence of water on the earth?

2. What was important to the development of fish?

3. What made possible the rise of mammals on the earth?

4. Why are mammals different from all life forms in the past?

5. What problem is caused by human beings?

a solid _________

the earth’s____________

other 4._____

Water: ____________ to the development of life

water vapour

nitrogen

carbon

extremely small _______ on the surface of the water

globe/ball

gases

atmosphere

fundamental

plants

early _________ and all sorts of fish

green plants on land

insects

amphibians

__________

huge animals (dinosaurs)

the rise of_________

human beings

shellfish

reptiles

Mammals

Land animals

“Big Bang”

other bodies

stars

a cloud of _____

atoms

dust

How

Did

life

begin

on

the

earth?

Summary

1. What should we do to protect the environment?

2. What other puzzles are hidden in the passage. Find them.

Discussion

Let’s appreciate some beautiful pictures of

the solar system.

Total lunar eclipse (月全食）

Total solar eclipse (日全食)

Meteor rain（流星雨）

Comet (彗星)

We have only one earth!

We should take care of the earth!

Homework

1. Summary the useful words and expressions in the text.

2. Finish the exercise on page 28.

3. Write a small passage: How to protect the earth?

Thank you!!![全文已结束，注意以上仅为全文的文字预览，不包含图片和表格以及排版]

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