Book3 Unit4warming up and reading

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Unit 4 Astronomy: the science of the stars

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Let’s enjoy some astronomical phenomena .

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How much do you know about the universe?

The earth 地球

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solar system太阳系

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The Galaxy 银河系

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The Milky Way

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宇宙岛——河外星系

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THE SOLAR SYSTEM Can you name each planet correctly using the letters given in the table below? A. 地球 ______ Earth

B. 木星 Jupiter ______C. 火星 Mars ______ D. 水星 Mercury ________ E. 海王星 Neptune _______

F. 土星 ________ Saturn G. 天王星 Uranus _______ H. 金星 Venus ________

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金星 Venus 地球 水星 Mercury Earth

火星 Mars 天王星 Uranus海王星

木星 Jupiter 土星 Saturn

Neptune

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A Quiz Game1. How old is the earth? A. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion years D. About 6.5 billion years 2. ______ of the earth surface is covered by water. A. 20% B. 30% C. 50% D. 70%

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3. How many planets are there in the Solar System? A. 6 B. 7 C. 8 D. 9 4. What is the total population of humans on the earth? A. About 3.5 billion B. About 4.5 billion C. About 5.5 billion D. About 6.5 billion

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5. How long does the rotation (自转) of the earth take? A. 12 hours B. 24 hours C. a month D. 365 days 6. Which continent is the smallest? A. Africa B. North America C. South America D. Oceania 7. On what day is the Earth day celebrated? A. April 22 B. May 4 C. August 21 D. November 11

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8. Which ocean is the largest? A. The Pacific Ocean B. The Arctic Ocean C. The Indian Ocean D. The Atlantic Ocean 9. Which country has the largest area? A. Canada B. China C. Russia D. U.S.A

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Pre-reading1. The origin of life on earth is a

question that interests astronomers.What do you know about it?

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2. Each religion and culture has its own ideas about how life began on earth. What do you know?

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Pangu separates the sky from the earth.