Earth's Water

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Across
  1. 2. To _____ something means to change it through a series of steps that may be natural or artificial.
  2. 5. During _____, water changes from a liquid to a gas, and during condensation, the opposite happens.
  3. 9. _____ is the process by which water vapor changes to a liquid when it comes in contact with a cold surface.
  4. 10. If something is _____, it contains poisonous or otherwise harmful substances.
  5. 11. A whale needs to head to the ocean's _____ to take a new breath of air.
Down
  1. 1. Air is a _____ that expands and contracts to fill all the space it can.
  2. 2. The _____, or point, of an experiment is to test an idea.
  3. 3. Deserts do not usually receive much _____, such as rain or snow.
  4. 4. A _____ does not keep the same shape when moved from place to place.
  5. 6. If an object is _____, it has a firm, stable form or shape.
  6. 7. _____ is the planet we live on and has one moon.
  7. 8. Oxygen in the air is _____, or unable to be seen.