内容正文:
Unit 4 Amazing Science
Section D
Topic 2 I’m excited about the things that will be discovered in the future.
1
( )1. The moon is _____ the earth of all the satellites.
A. closer B. closer to C. the closest D. the closest to
( )2. The diameter of Mars is 53% as _____ as _____ of the earth.
A. long; it B. wider; that C. wide; one D. wide; that
3. Mars is the ______ (four) planet from the sun in our solar system
and is ______ (name) after Mars, the Roman god of war.
4. The teacher told us that Mars ______ (go) around the sun at a
distance of about 228 million kilometers.
D
D
fourth
Review
goes
named
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2
Pre-reading
The Solar System
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4
Do you know their names?
慧星(Comet)
冥王星(Pluto)
水星
(Mercury)
金星
(Venus)
地球
(Earth)
火星
(Mars)
木星
(Jupiter)
土星
(Saturn)
天王星
(Uranus)
海王星
(Neptune)
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5
Read the passage and choose a proper title.
1a
1. Is There Life out There?
2. Our Planet
3. The Stars at Night
While-reading
Read 1a and answer the questions.
1. Have the scientists found life on other planets?
2. How many planets go around the sun?
3. What’s called the solar system?
4. Some spaceships have gone beyond the solar system, haven’t they?
5. Do you think there are lives on other planets in space?
No.
Eight.
The sun and its planets are called the solar system.
Yes.
1a
Scientists think that there has been life on earth for millions of years . However ,we haven’t found life on other planets yet . The earth is a planet and it goes around the sun .And there are seven other planets (that also go around the sun). The sun and its planets are called the solar system. The sola