Mercury and Venus

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Across
  1. 2. Mercury is similar in size and appearance to the _________
  2. 4. Mercury has _________ moons
  3. 7. In terms of speed, Mercury is the _________ planet in the solar system
  4. 10. the atmosphere on Venus is so hot because CO2 is a ___________ gas
  5. 11. Unlike Earth, Mercury does not have __________
  6. 15. Mercury is one of the 4 inner or ________ planets
Down
  1. 1. Mercury has an extremely thin ___________
  2. 3. The length of one year on Mercury is _________ than the length of one year on Earth
  3. 5. Day/Night temperatures on Mercury are very _______
  4. 6. Life may exist in the ________ of Venus
  5. 7. Mercury is the _________ planet from the Sun
  6. 8. Mercury is named after the Roman ________ god
  7. 9. Mercury's axis is only tilted _____ degrees
  8. 12. In terms of size, Mercury is the __________ planet in the solar system
  9. 13. Venus is the ________ planet in the solar system
  10. 14. Because it is so bright, Venus is often mistaken as a _________