Part 2- The Moon

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Across
  1. 3. Hypothesis about how a Mars sized planet hit Earth, causing a chunk to break off and become our moon.
  2. 5. Pilot of lunar landing module.
  3. 7. Peace Corps medical officer turned astronaut.
  4. 8. Large, flat land area, or plain on the surface of the moon.
  5. 10. 1st American to orbit Earth.
Down
  1. 1. Gases almost completely absent from the atmosphere.
  2. 2. The moon was orbiting the sun and was pulled by Earth into its orbit.
  3. 4. Nebular cloud + gravity pulled particles together forming the moon.
  4. 6. The 1st astronaut down the ladder on the moon.
  5. 9. A long, narrow valley that runs along the lunar surface.