Reading

HOW LIFE BEGAN ON THE EARTH

Unit 4Unit 4

Warming up

What are the names of the eight planets that circle our sun?

Match the names with the planets

• The Earth is the third planet.

• Venus is next to Mercury.

• Mars is between Earth

• Neptune is the furthest planet from the sun

• Saturn is between Uranus and Jupiter

• Mercury is closest to the sun

海王星 Neptune

水星Mercury

金星Venus

地球Earth

火星Mars

木星Jupiter 土星

Saturn

天王星Uranus

A Quiz Game

1. How old is the earth?

A. About 3.5 billion years

B. About 4.5 billion years

C. About 5.5 billion years

D. About 6.5 billion years

2. ______ of the earth surface is covered

by water.

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

3. How many planets are there in the Solar

System?

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

4. What is the total population of humans

on the earth?

A. About 3.5 billion B. About 4.5 billion

C. About 5.5 billion D. About 6.5 billion

5. How long does the rotation ( 自转 ) of the earth take? A. 12 hours B. 24 hours C. a month

D. 365 days6. Which continent is the smallest? A. Africa B. North America C. South America D. Oceania 7. On what day is the Earth day

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

8. Which ocean is the largest?

A. The Pacific Ocean

B. The Arctic Ocean

C. The Indian Ocean

D. The Atlantic Ocean

9. Which country has the largest area?

A. Canada B. China

C. Russia D. U.S.A

Prediction Look at the picture. Do you know the topic of this unit?

Do you know what it was like

before life appeared on earth?

可以演化成低级生命的小液滴水泡状的太空原始生命体

It was full of water.

海洋里的细胞开始分裂

登陆登陆

爬行动物

恐龙恐龙

Mammals

人类的兴起

1. The origin of life on earth is a question that interests astronomers. What do you know about it?

How old is the universe? (several billion years ago)

How old is the Earth? (between 4.5 and 3.8 million years ago)

Which were the first creatures or plants on Earth?...

Pre-reading

2. Each religion and culture has its

own ideas about how life began

on earth. What do you know?

In China, we all know that Pangu

separates the sky from the earth

and Nvwa made humans.

Pangu separates the sky from the earth.

中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌 , 将天地分开。死后 , 他的气息化成风和云 , 声音变成轰轰的雷声 , 左眼化为太阳 , 右眼化为月亮 , 手足与四肢变成大地的四极与五方的名山 , 血液化成江河 , 筋脉铺成道路 , 肌肉形成田地 , 须发成为星星 , 牙齿和骨骼化为金属、珍珠、玉石 ,

汗水成为滋润万物生长的甘霖和雨露。

Nvwa made humans.

Other legends about the beginning of

universe.

The Biblical Account

Day 1: God spoke and separated light

from darkness creating Day and

Night.

Day 2: God spoke and separated the

water creating sky and ocean.

Day 3: God spoke and created dry

land.

Day 4: God spoke and created the

sun, moon and stars.

Day 5: God spoke and created living

creatures in the air and sea.

Day 6: God spoke and created the

land animals and man.

Day 7: God rested and blessed this

day calling it Holy.

India

Brahma is the god

first represented in

the Hindu Triad. He is

the creator of the

universe and all living

beings are said to

have evolved from

him.