Earth

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Across
  1. 1. The study of plate movement
  2. 3. The San Andreas Fault
  3. 4. Mountains Caused by convergent plate movements
  4. 7. Planets Jupiter,Saturn,Uranus, and Neptune are known as
  5. 10. These longitudinal waves can travel through solids and liquids
  6. 12. years The approximate age of Earth
  7. 13. Tilt of earth's axis
  8. 15. The theorized source of water on earth
  9. 17. Mid-Atlantic Ridge
  10. 18. The only planet with liquid water on the surface
  11. 19. The process by which life produced oxygen
  12. 20. The month in which the northern hemisphere receives the most direct sunlight
  13. 21. The supercontinent that was present 200 million years ago
  14. 23. The layer of Earths atmosphere immediately before space
  15. 26. Filters the sun's UV from hitting earth
  16. 29. Sun is directly over this point during equinox
  17. 31. The point in a planets orbit farthest from the sun
  18. 32. Once considered a planet
  19. 35. The chemical that destory the Ozone layer
  20. 38. Can only travel through solids and not liquids
  21. 39. The instrument that records and measures seismic activity
  22. 42. The actual name for northern lights
  23. 43. and nickel The primary metals found in the core
  24. 44. The study of seismic waves
Down
  1. 1. The point in a planets orbit in which it is closest to the Sun and traveling at the greatest speed
  2. 2. The planet with the largest most visible rings
  3. 5. Giant wave caused by an earthquake
  4. 6. What are the higher frequency radio waves
  5. 8. The hottest planet in the solar system
  6. 9. The largest planet in the solar system
  7. 10. Ignoring the sun, the closest star to earth is
  8. 11. The layer of Earths atmosphere that contains the Ozone layer
  9. 14. The time for 1 rotation of earth
  10. 16. Closest celestial object to earth
  11. 22. The reason no rocks date older than 4 billion years
  12. 24. Events that are the source of Seismic waves
  13. 25. 26000 year wobble of earth's rotation axis
  14. 27. The chemical formula for breathable oxygen
  15. 28. Planet closest to the Sun
  16. 30. Our current north star
  17. 33. Planets Mercury,Venus,Earth,and Mars are called what
  18. 34. The month in which the Earth is closest to the Sun
  19. 36. The average distance a plate moves in a year
  20. 37. The distance from Earth to the sun
  21. 40. The Only star in our solar system
  22. 41. The chemical formula for the Ozone layer