Mercury and Venus

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