2. What is ft he primary chemical constituent of comets?
A. water
B. Nitrogen
C. Mathane
D. Carbon Dioxide
3. What is a meteorite?
A. a rock from spcae that strikes the ground
B. a piece of rock passing through the earth's atmosphere
C. tha trail left by a rock as it passes through the earth's atmosphere
D. all of the above
4. When does meteor shower occurs?
A. a meteor is about to get married
B. the earth passes through the asteroid belt
C. the head of a comet hits the earth's atmosphere
D. the earth passes through a swarm of dust particles in space, the remnants of a comet, one a year
5. How do you describe asteroids?
A. miniature planets
B. satelies of planets
C. pockets of gas in the solar system
D. planets orbiting the stars other than he sun
6. Why are meteorites and comets important in studying the origin of the solar system?
A. they have recently formed themselves
B. They are recently produced fragments of planets
C. they represent the material which formed the planets
D. none of the above
7. Comet tails are the result of
A. interplanetary material streaming into the comet
B. melting and evaporation of ice from the comet core
C. dust collected by by the comet as it moves in its orbit
D. solar wind blowing more gases from the central comet core
8. Meteors are
A. falling stars
B. Signals from the other worlds
C. solar wind planets captured by the earth's magnetic field
D. luminous trails left by samall extraterrestial particles rapidly passing through the air
9. The orbits of most comets, which we see in the inner solar system
A. are nearly circular
B. are highly elliptical
C. never come closer to the sun
D. are only slightly inclined the earth's orbit
10. Meteorites are composed of
A. hydrogen ice
B. Helium ice
C. Heavy elements like silicon
D. A, B, and c
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Answer:
1.) A 2.) D 3.) B 4.) A 5.) C 6.) D 7.) D 8.) B 9.) A 10.) D
Explanation:
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