The Earth System

1234567891011121314151617181920
Across
  1. 3. the air that surrounds Earth
  2. 5. what you can observe or measure about something that helps youfigure out what it is
  3. 6. matter that is made of only one kind of atom or molecule
  4. 8. a person who uses science knowledge to design something in order to solve a problem
  5. 9. a supply of something that is useful
  6. 10. reaction: a process in which substances change into different
  7. 12. when a gas turns into a liquid
  8. 15. the stuff that things are made of
  9. 16. to try something again using what you learned the last time you tried it
  10. 18. to try to make something new that solves a problem
  11. 19. all of the liquid water and ice on Earth
  12. 20. a group of parts that work together
Down
  1. 1. a group of atoms joined together in a particular way
  2. 2. water that has been used and now contains harmful substances
  3. 4. when a liquid turns into a gas
  4. 7. the solid part of Earth
  5. 11. all the living things on Earth
  6. 13. to put together multiple pieces of information in order to understandsomething
  7. 14. vapor: water in the form of invisible gas
  8. 17. a description of how something works or why something happens