science facts

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Across
  1. 4. Something that eats both plants and animals.
  2. 7. An object that is moving.
  3. 8. A cold desert.
  4. 9. An object that is not moving.
  5. 11. Huge rocks that separate the inner and outer planets.
  6. 12. movement of water going in a direct line.
  7. 13. A collection of planets that revolve around something.
  8. 14. The movement of air caused by air pressure.
  9. 15. A large region characterized by a specific type of climate.
  10. 17. A community of organisms.
  11. 18. The distance that light travels in one year.
  12. 19. A very rainy forest.
Down
  1. 1. cold air sinking warm air rising
  2. 2. how thick something is.
  3. 3. The 6th planet from the sun.
  4. 5. Any form of water that falls to the earths surface from the clouds.
  5. 6. when the house traps heat from the sun inside.
  6. 10. The movement of deep cold water going to the surface.
  7. 16. A collection of small water droplets in the air which forms when the air is cool.
  8. 20. A big hot ball in space.