PHY 121 Module 8 Crossword

Edit Answers
123456789101112131415161718
Across
  1. 3. The largest structural feature on Mercury.
  2. 5. Spacecraft that mapped Mercury in 2004.
  3. 8. One of two exploration rovers send to Mars in 2003.
  4. 10. 88 days on Mercury.
  5. 12. The lighter, heavily cratered regions of the Moon
  6. 14. Pockmarks on the surface of a planet.
  7. 15. NASA spacecraft that mapped Venus with imaging radar.
  8. 16. One of the metals making up Mercury's core.
  9. 17. The smallest terrestrial planet.
  10. 18. The theory that the Moon was once part of Earth but somehow separated from it early in their history.
Down
  1. 1. A theory
  2. 2. Latin for "sea"; the name applied to the dark, smooth features that cover 17% of the Moon's surface.
  3. 4. Russian probes that photographed the surface of Venus.
  4. 6. The theory that the Moon and Earth formed together but independently.
  5. 7. Evidence that water has flowed on Mars
  6. 9. Forces that cause stress and pressures in the crust of a planet
  7. 11. The largest volcano on Mars, and possibly in the entire solar system.
  8. 13. The theory that a chunk broke off the Earth after a huge impact, forming the Moon.
  9. 14. The theory that the Moon formed elsewhere and was captured by the Earth.