Earth System

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Across
  1. 2. all the living things on Earth
  2. 5. all of the liquid water and ice on Earth
  3. 7. when a liquid turns into a gas
  4. 11. the air that surrounds Earth
  5. 13. matter that is made of only one kind of atom or molecule
  6. 14. the stuff that things are made of
  7. 15. a group of atoms joined together in a particular way
Down
  1. 1. a supply of something that is useful
  2. 3. what you can observe or measure about something that helps you figure out what it is
  3. 4. reaction a process in which substances change into different substances
  4. 6. the solid part of Earth
  5. 8. water that has been used and now contains harmful substances
  6. 9. when a gas turns into a liquid
  7. 10. to try to make something new that solves a problem
  8. 12. vapor water in the form of invisible gas