Earth in Space and Earth's Structure

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Across
  1. 5. a deep, narrow valley with steep sides formed by mountains or hills
  2. 6. the wearing away of the earth's surface by wind, flowing water, or glaciers
  3. 8. the star at the center of the solar system which gives light and heat to the planets revolving around it
  4. 9. a shaking movement in the plates of the earth's crust
  5. 10. planet with coldest atmosphere
  6. 12. lowest point on Earth's continental surface
  7. 14. small planet-like bodies that revolve around the sun; typically orbit between Mars and Jupiter
  8. 16. pieces of rock and iron traveling through space
  9. 17. a break in the earth's crust that occurs when folded land cannot bend any further
  10. 18. a sun and all the objects that revolve around it
  11. 19. largest planet
  12. 22. highest point on Earth's surface
  13. 24. the center of the earth
  14. 28. meteoroids that enter Earth's atmosphere
  15. 29. the four planets that are smaller, solid, and rocky: Mercury, Venus, Earth, and Mars
  16. 30. the mass of air surrounding the earth
  17. 31. low lands between hills or ranges of mountains
  18. 32. meteors that strike Earth's surface
  19. 34. hottest planet
  20. 36. the part of the earth made up of land; the earth's crust
  21. 40. planet with most visible ring system
Down
  1. 1. land beneath the ocean
  2. 2. bodies of dust and gas that appear as bright balls with long tails
  3. 3. the four planets that are bigger and made mostly of gas: Jupiter, Saturn, Uranus, Neptune
  4. 4. planet with highest winds
  5. 7. a bend in layers of rock that occurs when plate movements squeeze the surface of the earth until it folds
  6. 11. planet closest to the sun
  7. 13. life-sustaining planet
  8. 15. a hill of sand formed by wind
  9. 16. lowest point on Earth under the ocean
  10. 20. large masses of ice that move slowly over a land surface
  11. 21. the altering of the shape of rocks through chemical change or fracture
  12. 22. planet that is red in appearance and about half the size of Earth
  13. 23. the outer layer of the earth; huge plate-like sections of rock that float on a partially melted layer of the mantle
  14. 25. the area or zone of earth where life is found
  15. 26. a mountain formed when lava rises through the earth's crust
  16. 27. the part of the earth made up of water; oceans, lakes, and rivers
  17. 33. a thick layer of dense, hot rock between the earth's outer core and its crust
  18. 35. the amount of matter something contains
  19. 37. a large, fast-moving sea wave often caused by an earthquake or underwater volcanic eruption
  20. 38. the circular path that planets take around the sun
  21. 39. smallest planet, if a planet at all