Earth and Space

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Across
  1. 2. a mound of sand formed by the wind
  2. 3. very small pieces of rock, sand, and silt carried by water
  3. 4. what is happening in the atmosphere at a certain place and time
  4. 5. process by which a liquid changes into a gas
  5. 7. mixture of gases that surround a planet
  6. 8. process by which a gas changes into a liquid
  7. 10. water that falls from the air to Earth's surface
  8. 11. energy-rich resource formed from the buried remains of once-living organisms
Down
  1. 1. deep valley with very steep sides
  2. 2. type of rock that forms when layers of sediment are pressed together
  3. 4. process in which water continuously moves from Earth's surface into the atmosphere and back again
  4. 6. natural feature found on Earth's surface
  5. 9. fan-shaped mass of material deposited at the mouth of a stream