人教版高中英语必修三第四单元阅读课件

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
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。
Pre-reading
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?...
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.
1. What do we mean when we say we are studying a subject scientifically? Or what’s the correct attitude towards science? We should be objective, not superstitious.
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.
木星 Mercury
天王星 Neptune 土星 Jupiter
海王星 Saturn
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. What’s the correct way to prove a scientific idea? We should design experiments to test it for several times. Then we can analyze the results and draw a conclusion at last.
3. What are the most important skills we need to be real scientists? Careful, objective and logical, draw conclusions from the experiments and not impose conclusions on the data. (impose…on… 把…强加于…)
人教课标版 高一必修3
Unit 4
Reading HOW LIFE BEGAN ON THE EARTH
Warming up
What are the names of the eight planets that circle our sun?
火星 金星 Mars Venus 水星 地球 Uranus Earth
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
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
D. 365 days
6. 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
Prediction
Look at the picture. Do you know the topic of this unit?
海洋里的细胞开始分裂
wenku.baidu.com
登陆
爬行动物
恐龙
Mammals
人类的兴起
Do you know what it was like before life appeared on earth?