Astronomy Planets Quiz

1. Thin disk of small particles of ice and rock that surround a planet?

• A.

  Ring

• B.

  Terrestrial planets

• C.

  Greenhouse effect

• D.

  Gas giants

2.the first four planets from the sun and they have rocky surfaces

• A.

  Terrestrial planets

• B.

  Ring

• C.

  Retrograde rotation

3. spinning motion east to west opposite of other planets

• A.

  Retrograde rotation

• B.

  Ring

• C.

  Greenhouse effect

4. planets that are very large and do not have a solid surface

• A.

  Gas giants

• B.

  Terrestrial planets

• C.

  Ring

5. the trapping of heat by the atmosphere

• A.

  Greenhouse effect

• B.

  Ring

• C.

  Gas giants

6. has a rocky surface

• A.

  Mercury

• B.

  Earth

• C.

  Venus

• D.

  Mars

7.  70% covered with water

• A.

  Neptune

• B.

  Mars

• C.

  Earth

8. rotates in the opposite direction from most other planets and moons

• A.

  Venus

• B.

  Mars

• C.

  Neptune

9. called the ''red planets'' because of the color of the dust

• A.

  Mars

• B.

  Venus

• C.

  Neptune

10. has at least one moon

• A.

  Earth

• B.

  Mars

11. similar to each other in size density and internal structure

• A.

  Venus

• B.

  Earth

12. has almost no atmosphere

• A.

  Mercury

• B.

  Venus

13. atmosphere is so heavy and thick that it would crush a human

• A.

  Venus

• B.

  Saturn

• C.

  Neptune

14. has tilted axis that causes seasons

• A.

  Earth

• B.

  Mars

15. atmosphere has low pressure and is mostly carbon dioxide

• A.

  Mars

• B.

  Saturn

16. which planets are the gas giants

• A.

  Jupiter

• B.

  Uranus

• C.

  Saturn

17. why doesn't the gas on a gas giants escape into space as it has on mercury

18. what object in the solar system is made of similar materials as the gas giants

19. what planet is by far the most massive of all the planets the revolve around the sun

20. why is Pluto now considered a dwarf planet