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Unit 4
Astronomy:
the science of the stars
Step 1 Warming up
Do you know how many planets circle around the sun in our solar system ?
What are they? Can you match the names with the planets?
Jupiter
Uranus
Neptune
Saturn
Mercury
Mars
Earth
Venus
水星
金星
地球
火星
木星
土星
天王星
海王星
Solar
system
Do you know each religion or
culture has its own ideas
about the beginning of the
universe?
Pangu separates the sky from the earth
The The developmentdevelopment of the lifeof the life
breath winds and clouds
voice thunder
left eye the sun
right eye the moon
blood the rivers
veins the roads
Other legends about the beginning of universe
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
上帝创世说:
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
Look at the picture in the text, try to guess: What’s the main idea of the text?
A. how did water begin?
B. how did earth begin ?
C. how did man begin ?
D. how did life begin ?
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 about the formation of the universe.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.
Careful reading Task 1 : Read para 1 and answer the follo
wing questions.
1.According to a widely accepted theory, how the universe began?
2.After the “Big Bang” what began to form?
The universe began with a “Big Bang”.
After that, atoms began to form and combine to create stars and other bodies.
The Big BangThe Big Bang
• Task 2 : Read para 2 and fill in the blanks.
For several billion years after the _________,the earth was still just ______________.Between __and_________ years ago when the dust settled into_____________. It exploded loudly with ____and____. They produced some gases, which were to make the earth’s __________. As the earth cooled down, _______ began appear on its surface.
Big Banga cloud of dust 4.5 3.8billion
a solid globefire rock
atmospherWater
• Task 3 : Read para 3 and answer the question.
Why did scientist believe water is fundamental to the development of life?
Because water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop.
1 2
3
4
5
6
78
9
Small plants in water Shellfish and all sorts of fish
Green plants on landInsects (on land)
Amphibian (on land and in water)
ForestsReptiles (on land)Dinosaurs (on land)Mammals (on land)
The development of lifeParagraph 4
water Plants in the water Shellfish and fish
Plants on landInsects and amphibians
Reptiles
Dinosaurs Mammals
• ( ) A Insects and amphibians appeared.• ( ) B Dinosaurs appeared.• ( ) C The earth became a solid ball.• ( ) D Small plants grew on the water. • ( ) E Reptiles appeared.• ( ) F Plants began to grow on dry land.• ( ) G The earth was a cloud of dust.• ( ) H Water appeared on the earth.• ( Shellfish and other fish appeared.• ( ) J The universe began with a “Big Bang”.• ( ) K Clever animals with hands and feet appeared.• ( ) L Mammals appeared.
5
10
6 )
2
9
4
8
3
7
1
Detailed readingPut the order of development of life into a time line.
12
11
Read the last paragraph again, answer the following question
• After the human beings appearad, what did they do to the earth?
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 .
How to protect the earth and
make it a better place to live on?
solar energy
plant trees
recycle rubbish prevent desertification
save water
purify air
What can we do take care of the earth?
plant trees
save water
save paperjoin Earth Hour
ride bikes or take buses or walk to school
use recyclable products
reduce rubbish
save electricity
Only if we understand can we care; 唯有了解,我们才会关心。Only if we care will we help; 唯有关心,我们才会行动。Only if we help shall all be saved. 唯有行动,生命才会有希望。 ----Jane Goodall —— 珍妮 古道尔
We have only one earth!
We should take care of the earth!
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