Unit 6 The Earth’s Atmosphere 课件

课件24张PPT。Unit 6 The Earth’s Atmosphere本单元的重点知识：
1. 单词：熟练掌握本单元后单词的音、形、意
2. 词组：
1) be made from 由……制造
2) be made of 由……制造
3) tiny drops of water 小水滴
4) reduce waste 减少浪费5) 20 miles thick 20英里厚
6) protect…from 保护……免遭……
7) be made up of 由……组成
8) three—fourths of the gases 3/4的气体9) depend on 依靠
10) stay alive 生存
11) be used to 习惯于
12) draw worldwide attention 吸引世界注意
13) blow…away 吹走
14) be full of 充满……
15) be used for 用于做某事句子：
1) Clouds are made of tiny drops water. 云是由小水滴构成的。
2) The atmosphere surrounds the earth like a blanket.
大气层像毯子一样包裹着地球。
3) The atmosphere protects the earth from the sun’s heat.
大气层保护地球免遭太阳的炙烤。
4) The air in the atmosphere is made up of dust and gases.
大气层中的空气是由尘土和各种气体组成。5) More than three-fourths of gas is nitrogen.
多于四分之三的气体是氮气。
6) Plants depend on nitrogen to stay alive. 植物依靠氮气来生存。
7) More than three-fourths of the gas is nitrogen.
气体中四分之三的气体都是氮气。
8) People who travel to the mountains find it harder to breathe.
到山上旅行的人发现这里呼吸比较困难。9) Big cities are full of cars. 大城市里都是汽车。
10) They are used for business and pleasure. 他们是用来商务和娱乐的。
11) Something should be done about the use of cars in order to have cleaner air.
为了得到更清洁的空气，应该就汽车的使用问题采取措施。六、本单元重点知识讲解：
1. The ship is made from waste materials.
The T-shirt is made of cotton.
例如：
① The book is made of paper and paper is made from wood.
② The glass is made of glass and glass is made from SiO2.2. The air that surrounds the earth is called the atmosphere.
包围地球的空气被称为大气。
be called 被称为
同义词：be named
例如：
The boy is called “Da Niu” by his classmates.
The machine is called “Washing machine”.
That city will be called “Water City”.3. It surrounds the earth like a blanket—20 miles thick.
20 miles thick 20英里厚
数字+单位+形容词
例如：
1.7 metres tall 一米七高
6 metres wide 六米宽
20 kilometres away 20公里远① Our classroom is three metres tall, 7 metres long and 6 metres wide.
② The Yellow River is 5000 kilometres long.
It is the second longest river in China.
③ The river is about 20 metres deep. You mustn’t swim in it. It’s too dangerous!【典型例题】
① The ruler is （20厘米长）.
② The book is （5厘米厚）.
③ The hole is about （50米深）.
④ The tree is nearly （36米高）.4. The atmosphere protects the earth from the sun’s heat.
protect…from 保护……免遭
例如：
① The thick coat protects the body from the cold.
② The helmet protects the head from the rock.
③ The plastic cover protects the book from being broken.5. Nothing could remain alive on the earth without the atmosphere to protect up.
Plants depend on nitrogen to stay alive.
① remain alive 存活
stay alive 存活
例如：
remain silent stay calm
remain standing stay awake
remain the goal stay cool
remain weak stay quiet② depend on 依靠，依赖 例如：
The people in the south depend on the government.
The pandas depend on our good care.
You can’t depend on your parents forever.【典型例题】
① The success of the Olympic Game （依赖）Chinese people’s hard work.
② The poor children （依靠）those rich people’s support.6. The air in the atmosphere is made up of dust and gases.
be made up of 由……构成，由……组成
例如：
The class is made up of 20 boys and 19 girls.
The teacher team is made up of 126 teachers.7. More than three—fourths of the gas is nitrogen.
three—fourths 四分之三
分数的概念：
分数由基数词作分子，序数词作分母构成，分母序数词都用复数。8. People who travel to the mountains find it harder to breathe.
sb. find it + adj. + to do sth. 某人发现做某事怎么样
例如：
I find it very interesting to travel to the forest.
The boys find it very cool to smoke.【典型例题】
① 我们发现早睡觉有好处。
We .
② 他发现游过这条河很难。
He found .9. Air pollution has drawn worldwide attention.
draw one’s attention 引起某人的注意
10. Big cities are full of cars.
be full of… 装满……，充满……
The bag full of books.
The room is full of people.Exercise【典型例题】
1）一屋子的烟。
The room .
2）鸟巢中全都是兴奋的观众。
The net excited audiences.
3）满满一袋大米被送到李奶奶家。
Granny Li.
4）那个小姑娘给了我满满一碗粥。
The little girl gave me .Thank you!Bye!