1. How do you describe asteroids?
A. miniature planets
B. Satellites of planets
C. pockets of gas in the solar system
D. planets orbiting the stars other than the sun
2. Which of the following is a primary chemical constituent of comet?
A. Water
B. methane
C. nitrogen
D. Carbon dioxide
3. If the orbital period of comet is 75 to 100,000++ years and the asteroid is 1-00 years, which is most likely to make a more frequent "visitor of Earth?
A. Asteroid
B. comet
C. pluto
D. saturn
4. These objects that orbit the sun are nicknamed as " dirty snowballs"?
A. asteroids
B. comet
C. meteors
D. meteorites
5. What do you call to fragment from the meteoroid that enters Earth's atmosphere and makes it to the ground?
A. meteor
B. meteoroid
C. Meteorite
D. All of the above
6. How many tails does a comet have?
A. one, an ion tail
B. two, an ion and a dust tail
C. comets do not have tails
D. comets have hundreds of tiny tails
7. Asteroids mainly originate from the main asteroid belt which lies between these planets;
A. mars and Earth
B. venus and mars
C. mars and jupiter
D. jupiter and saturn
8. What do you call to a region of the solar system between the orbits of mars and jupiter?
A. asteroid chain
B. comets chain
C. comets jupiter
D. asteroid belt
9. 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 materials that formed the planets.
D. none of the above.
10. when does meteor shower occurs?
A. a meteor is about to get married.
B. the earth passes through the asteroids belt.
C. the heax 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, once a year.
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