高中英语必修三Astronomy：the_science_of_the_starsppt课件

(2)Why did the plants grow before the animals came? ___________________________________________ 答案：Because plants provided oxygen for animals to breathe. (3)Why is it wrong in films and stories to show dinosaurs and people together? ___________________________________________ 答 案 ： Because dinosaurs died out long before human beings developed on the earth.
Unit 4 Astronomy：the science of the stars
Section Ⅰ
Warming Up & Reading—Preparing
Section Ⅰ
预习多维感知
预习多维感知
►Step One：Ask and Discussion 1．Do you know how many planets circle around the sun in our solar system? _____________________________
答案：C
4．Why did plants appear earlier than animals?
A．Because plants could produce oxygen，which was important for
animals. B．Because plants were more advanced than animals. C．Because animals needed more water. D．Because plants needed more water.
④65 million years ago，the age of the dinosaurs ended.
A．②①③④ B．④③②①
C．②④③①
答案：D
D．②③④①
2．How did the atmosphere on the earth appear?
A．It came from space.
_____________________________
答案：Venus(金星)；Earth(地球)； Mars( 火 星 ) ； Mercury( 水 星 ) ； Jupiter( 木 星 ) ； Saturn( 土 星 ) ； Uranus(天王星)；Neptune(海王星)
2．Each religion and culture has its own ideas about how life began on earth.What do you know? ________________________ ________________________ ________________________ 答案：In China，we all know that Pangu separates the sky from the earth.In western culture，God created the world in six days.Many scientists believe that the universe began with a huge explosion called the “Big Bang”．
答案：A
5．According to the passage we can know ________. A．only the earth has life on it in space B．oxygen in the atmosphere on the earth came from the “Big Bang” C．humans are the cleverest animals of the earth D ． plants played an important part in the appearance of animals 答案：D
►Step Two：Fast Reading Scan the text and then choose the best answer according to the text. 1．What is the correct order according to the text? ①The clever animals with hands and feet appeared and spread all over the earth. ②The “Big Bang.” ③Small plants began to appear on the surface of the water.
A．Because it is very warm on the earth.
B．Because it is cool enough on the earth.
C．Because there is plenty of water on the earth.
D．Because it is big enough.
►Step Three：Careful Reading 1．Read the text carefully and then answer the following questions.
(1)Why was the earth different from other planets?
___________________________________________ 答案： Because the water remained on the earth.
B．It came from the explosion.
C．It came from the oceans.
D．It came from the forests.
答案：B
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3 ． In our solar system ， why does life only exist on the
earth?