Tài liệu hạn chế xem trước, để xem đầy đủ mời bạn chọn Tải xuống
1
/ 27 trang
THÔNG TIN TÀI LIỆU
Thông tin cơ bản
Định dạng
Số trang
27
Dung lượng
3,28 MB
Nội dung
Who is he? What did he discover? When did he discover the law of gravity? Isaac Newton the law of gravity UNIT 3 GRAVI TY VOCABULARY GRAVITY a high jumper THE EARTH THE MOON VOCABULARY Whirl around / travel around Hurl off / shoot off SPACE Outer space orbit UNIVERSE PLANET A ROCKET Take off SPEED escape from A man-made satellite Float about ASTRONAUT = spaceman Space capsule / space ship Space suit helmet Weightless (adj) Weightlessness (n) Space flight Anchor (v) Do you agree or disagree? 1. Gravity pull everything down. 2. A champion high jumper can jump more than ten feet off the ground. 3. As the earth whirl around, everything is thrown off the earth. 4. Man-made satellites leaves the earth at very great speeds. 5. Every person has a weight on the earth. 6. Astronauts orbiting the earth don’t have weight. 7. Weightlessness is a big problem. 8. Other bodies in the universe have a pull just as the earth does. 9. The sun exerts a pull on other planets in its system. Even a high jumper can jump only about seven and a feet off the ground. The earth pulls him so hard that he cannot jump any higher. The pull of the earth is called gravity. How high can a high jumper jump? He can jump only about seven and a half feet off the ground. Why can’t he jump higher? Because the earth pull him very hard. What do you call the pull of the earth? The pull of the earth is called gravity. Gravity makes water run downhill. It makes balls thrown into the air fall back down, and ripe apples drop from trees. Gravity keeps us all from being hurled off the earth as it whirls around. It keeps the moon travelling around and around the earth instead of shooting off into space. [...]... apple wouldn’t drop from trees We would be hurled off the earth The moon would be shot into space Some man-made satellites have escaped from the earth and gone into outer space never to return But to do so they had to take off from the earth at a speed of more than 25,000 miles an hour Can man-made satellites escape from the earth? Yes, it can How can they escape from the earth? They had to take off... away Do you agree or disagree? 1 Gravity pull everything down 2 A champion high jumper can jump more than ten feet off the ground 3 As the earth whirl around, everything is thrown off the earth 4 Man-made satellites leaves the earth at very great speeds 5 Every person has a weight on the earth 6 Astronauts orbiting the earth don’t have weight 7 Weightlessness is a big nuisance 8 Other bodies in the... ripe apples drop trees from Gravity keeps us all from being hurled off the earth as it whirls around It keeps the moon travelling around and around the earth instead of shooting off into space Some man-made satellites have escaped from the earth and gone into space never to return But to do so they had to take off from the earth at a speed of more than 25,000 miles an hour A person can easily find . Who is he? What did he discover? When did he discover the law of gravity? Isaac Newton the law of gravity UNIT 3 GRAVI TY VOCABULARY GRAVITY a high jumper THE EARTH THE. shoot off SPACE Outer space orbit UNIVERSE PLANET A ROCKET Take off SPEED escape from A man-made satellite Float about ASTRONAUT = spaceman Space capsule / space ship Space suit helmet Weightless. feet off the ground. 3. As the earth whirl around, everything is thrown off the earth. 4. Man-made satellites leaves the earth at very great speeds. 5. Every person has a weight on the earth. 6.