Choose the correct answer for each question.

1. The area in which asteroids orbit the Sun is called the

   1.   ?    gaseous tail.
   2.   ?    meteorite belt.
   3.   ?    asteroid belt.
   4.   ?    asteroid tail.

2. As a comet is heated more, dust and ionized gas particles are pushed away from the head by the pressure of the Sun's radiation. They move away and form a

   1.   ?    siderites effect.
   2.   ?    asteroid tail.
   3.   ?    luminous tail.
   4.   ?    tektite end.

3. Minor planets revolving around the Sun, mostly between Mars and Jupiter, are called

   1.   ?    comets.
   2.   ?    an asteroid belt.
   3.   ?    tektites.
   4.   ?    asteroids.

4. About how many years does it take Halley's Comet to complete its orbital cycle?

   1.   ?    10
   2.   ?    50
   3.   ?    75
   4.   ?    150

5. Comets are believed to be composed of

   1.   ?    hydrogen and oxygen.
   2.   ?    frozen gases and dust.
   3.   ?    nitrogen and sodium.
   4.   ?    frozen dust and carbon.

6. An official catalog of comet appearances going back to Halley's appearance in 87 B.C. tells us that there are presently how many known comets?

   1.   ?    Less than 400
   2.   ?    About 500
   3.   ?    About 600
   4.   ?    More than 700

7. The head of a comet usually containing a nucleus is known as a

   1.   ?    tail.
   2.   ?    coma.
   3.   ?    tektite.
   4.   ?    aerolite.

8. Meteoroids that enter the Earth's atmosphere are called

   1.   ?    tektites.
   2.   ?    aerolites.
   3.   ?    stellar fragments.
   4.   ?    meteors

9. Sometimes the Earth crosses a part of a former comet path. The tiny particles remaining from the comet then collide with our atmosphere, producing a

   1.   ?    asteroid shower.
   2.   ?    gaseous tail.
   3.   ?    meteor shower.
   4.   ?    meteoroid shower.

10. What are the stony meteorites called?

    1.   ?    siderites
    2.   ?    tektites
    3.   ?    aerolites
    4.   ?    comas

11. A meteor that strikes Earth's surface is called a

    1.   ?    tektite.
    2.   ?    meteorite.
    3.   ?    meteoroid.
    4.   ?    meteor.

12. Astronomers believe that meteoroids originated from the fragments of a shattered planet within the

    1.   ?    meteor belts.
    2.   ?    sun zones.
    3.   ?    auroias zones.
    4.   ?    asteroid belt.

13. Meteorites that are made up of iron and nickel are calle

    1.   ?    tektites.
    2.   ?    aerolites.
    3.   ?    siderites.
    4.   ?    comas

14. In 1894 Admiral Robert Peary found the largest meteorite ever found in the western hemisphere. In what country was it discovered?

    1.   ?    Candor
    2.   ?    Greenland
    3.   ?    America
    4.   ?    France

15. A heavenly body, sometimes visible without a telescope, having a large elliptical orbit around the Sun, is known as a

    1.   ?    comet.
    2.   ?    asteroid.
    3.   ?    stellar fragment.
    4.   ?    meteor.

16. A heavenly body described as a chunk of rock or metal orbiting in outer space is called a

    1.   ?    comet.
    2.   ?    meteoroid.
    3.   ?    stellar fragment.
    4.   ?    asteroid.

17. Meteorites that usually weigh between an ounce and a pound are called

    1.   ?    asteroids.
    2.   ?    comets.
    3.   ?    tektites.
    4.   ?    aerolites

18. What heavenly bodies in our solar system are the most plentiful and number more than one hundred billion?

    1.   ?    Asteroids
    2.   ?    Comets
    3.   ?    Aerolites
    4.   ?    Tektites

19. What heavenly bodies are invisible because of their relatively small size?

    1.   ?    Asteroids
    2.   ?    Comets
    3.   ?    Meteoroids
    4.   ?    Aerolites

20. What do we call an extremely large and bright meteor that will probably end up as a large meteorite, landing somewhere on Earth?

    1.   ?    Siderites
    2.   ?    Asteroid belt
    3.   ?    Fireball
    4.   ?    Aerolites