This 6 weeks crossword puzzle

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Across
  1. 4. when two plates collide
  2. 6. the weakest wave
  3. 9. is something that forms near the equator
  4. 10. the ground with water runs off
  5. 11. different shapes on the shadow of the moon
  6. 12. above Earth's natural satellite
Down
  1. 1. is a plate that goes under another plate
  2. 2. used to view bones
  3. 3. the only wave that people can see
  4. 5. the strongest wave
  5. 7. a large steep hill made by tectonic plates
  6. 8. rising and falling ov the sea made by the moon