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【新课标】人教版高中英语必修3Unit


Module III Unit 4

I. Warming up

1.What’s the meaning of the word the of stars; “science Astronomy ”? the scientific study of stars and planets. 2. What words will you t

hink of when we talk about this topic? star, planet, the sun / moon / earth, solar system
恒星 行星 太阳 月球 地球 太阳系

3. How many planets are in the solar system?

Scientists now think Pluto is too small to be called a planet.

1111

The Solar System

5. The names of eight planets. ? Mercury 商业之神”和“旅行之 1) 水星 神” ? Venus 爱与美之神 2) 金星 ? Earth 该亚 3) 地球 ? Mars 战神 4) 火星 ? Jupiter 天神 5) 木星 ? Saturn 农业之神 6) 土星 ? Uranus 宇宙之神 7) 天王星 海神 ? Neptune 8) 海王星

6. Put them in correct order on P25. Uranus
Venus Mars
Mercury

Neptune
Saturn

Earth

Jupiter

Do you know their origin?

II. Pre-reading

1.Have you ever asked your mother, “Mom, where do I come from”? 2. Nearly everybody has this or that puzzles: How do human beings come into being? How does the earth come into being? 3. In China, there are two legends about these puzzles. Do you know the names?

盘古开天辟地

女娲补天造人

4. In the western culture, who creates everything in the world?

III. Fast-reading

1.Do you believe in such stories? Are they based on science? 2. In this unit, we’ll learn something more scientific. 3. What’s the title of the text? 4. From the title, we can predict that the text may tell us the origin of life on the earth.

Read quickly and match the main idea of each paragraph

Paragraph 1: Paragraph 2: Paragraph 3: Paragraph 4: Paragraph 5:

A. The importance of water for life B. The development of plants and animals on the earth C. The formation of the earth D. A widely accepted theory about the formation of the universe E.The arrival of humans and their impact on the earth

Detailed reading
This text can mainly divided into two stages

Stage 1 : The development of the earth

(para 1—3)
Stage 2 : The development of life (para 4—5)

Stage 1: The development of the earth (1) After the Big Bang, what was the earth like? a cloud of dust a solid globe

(2) What happened next? exploded with fire and rock produced water vapour and gases

(3) What did the water vapour and gases form?

the earth’s atmosphere

(4) What appeared as the earth cooled down?

water is important for the beginning of life on the earth.

Water appeared

Why is water so important for the beginning of life?
Because water allowed the earth to dissolve harmful gases into oceans and seas.

Stage2 The development of life

1.What life developed after water appeared? small plants appears in water

2.What life developed in water next? Shellfish and all sorts of fish

3.What about the life on land? green plants began to grow on land insects appeared

4. What life developed next on land?
amphibians on land and in the water forests

5.What life developed after forests appeared?
reptiles appeared dinosaur developed

6.What life developed after dinosaurs? mammals on land

7. What life developed after mammals? small clever animals

1.Who are the small clever animals with hands and feet? 2. Are they taking care of the earth well? Why?

Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.

The earth may become too hot to live on .

The earth is becoming hotter and hotter!

Can you fill in the blanks?

plants

animals
shellfish and all 2 sorts of fish 4 insects 5 amphibians 7 8 9 10

1 small plants in water

3Green plants on land

6 forests

reptiles dinosaurs mammals humans

Can you put the order of development of life into a time line?
8 1. Insects and amphibians appeared. 3 3. The earth became a solid ball. 9 5. Reptiles appeared. 2 7. The earth was a cloud of dust 6 9. Shellfish and other fish appeared. 12 11. Clever animals with hands and feet appeared 10 2. Dinosaurs appeared. 4.Small plants grew on the water. 7 6. Plants began to grow on dry land. 4 8. Water appeared on the earth 1 10. The universe began with a “Big Band”. 11 12. Mammals appeared. 5

Ex.2 on P27

summary
? After the “big bang”, the earth was still just a clouddust of _______,it exploded _______loudly with fire and rock, in time to produce which were _____ carbon the_________, water vapour and other water gases. Then ________ began to appeared on the earth.

The small plants in water are considered ____________ to be the earliest lives on the earth. The O2 shellthey supplied encouraged the lives of____ -fish and fish Slowly green plants grew on __________. land animals land, which were followed by __________ amphibians When the plants like insects & ________. forests ______ reptiles appeared. Then grew into______, dinosaurs _______ developed but disappeared later, which made the rise of a totally different mammal possible, and finally humans animal,______, _____ spread all over the world.

Homework:
1. Finish the exercise 1and 2 on
page 63 2. Read the text again and find out your difficult points.


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