Unit 4 Reading Teaching aims:  Ability aim: Help the students form a good habit of reading.  Knowledge aim : Enable the students to know the development.

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Presentation transcript:

Unit 4 Reading

Teaching aims:  Ability aim: Help the students form a good habit of reading.  Knowledge aim : Enable the students to know the development of life.  Emotional aim: Cultivate the students’ awareness of protecting the earth..

 Chinese fairy tales  Bible stories Warming up

How life began on the earth

Step1:skimming Skim the passage and complete the following exercises.

How does the author develop the passage? Task 1: A. Give examples (举例) B. In time order (以时间顺序) C. Comparison (比较)

What’s the writing style of the text? A. Narrative 记叙文 B. Explanation 说明文 C. Essay 散文 Task 2:

Step2:Scanning Scan the passage and answer the questions.

Why was the earth different from other planets? A. It produced a lot of heat. B. The water remained C. Water disappeared. D. It was the oldest planet.

Why did the plants grow before the animals came? 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 forest. D. It was easier for plants to grow.

What 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.

Step 3 : Looking and thinking Watch a video and try to give the right order of the pictures.

The Big Bang A cloud of dust A solid globe atmosphere

Plants in the water Early shellfish and fish Plants on land water

amphibians Reptiles DinosaursMammals

Man had evolved from apes. That’s the development of life.

Step4:Careful reading Read the passage carefully and do the exercises.

1.Match the main idea with each paragraph. Para. 1 A.The formation( 形成 ) of the earth. Para. 2 B.The importance of water for life. Para. 3 C.A widely accepted theory – the Big Bang Para. 4 D.The arrival of humans and their impact on the earth. Para. 5 E.The development of plants and animals on the earth.

2.Sentence structure. 1.They were in time to produce carbon, nitrogen, water vapour and other gases. 2.They multiplied and filled the oceans and seas with oxygen. 3.Carbon dioxide prevents heat from escaping from the earth. 4.It was not immediately obvious that water was to be fundamental to the development of life. A. increase in number C. stop/keep…from B. important D. after a long period of time

1. 朝四面八方 2. 及时, 迟早 3. 冷却 4. 长成 … 5. 下蛋 6. 产生,分娩 7. 阻止 … 做 … in all directions in time cool down grow into lay eggs give birth to… prevent …from … Step5:Language points

Greenhouse effect The earth is our only one home.Are we taking good care of the earth? What problems are humans causing ? putting too much carbon dioxide into the air the earth may become too hot No life will be on the earth discussion

As a student, what little things can we do for the earth?

solar energy plant trees recycle rubbish prevent desertification save water purify air

We have only one earth! We should take care of the earth!

Only if we care shall we help ! Only if we help will all be saved!

 Make a poster about protecting the earth with your group members.