Earth and space basics

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Across
  1. 3. The regular rise and fall of the ocean's surface influenced by the moon's gravity pulling on earth
  2. 7. a force that exists between any two objects that have mass and that pulls the objects together
  3. 8. layer protects Earth from ultraviolet rays
  4. 11. A resource that can be replaced within a reasonable amount of time
  5. 12. innermost layer of the earth
  6. 14. largest and second outermost layer of the earth
  7. 15. a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
  8. 18. A plate boundary where two plates move toward each other.
  9. 19. A plate boundary where two plates move past each other in opposite directions.
  10. 20. A tropical storm that has winds of about 119 kilometers per hour or higher.
Down
  1. 1. A plate boundary where two plates move away from each other.
  2. 2. A large cloud of dust and gas in space. (Some are regions where new stars are beginning to form.)
  3. 4. layer of water that makes up ¾ Earth's surface
  4. 5. gaseous region that surrounds the earth
  5. 6. The horizontal movement of air from an area of high pressure to an area of lower pressure
  6. 9. A resource that once used, cannot be replaced in a reasonable amount of time
  7. 10. the outermost shell of a terrestrial planet
  8. 13. second innermost layer of the earth
  9. 16. an imaginary line through the center of a body about which the body rotates.
  10. 17. A measure of how hot or cold something is.