Earth Systems Crossword

8. water in the form of invisible gas.
9. water that has been used and now contains harmful substances.
11. a description of how something works or why something happens.
13. a group of part that work together.
14. a process in which substances change into different substances.
16. a person who uses science knowledge to design something in order to solve a problem.
18. to try something again using what you learned to the last time you tried it.
19. the air that surrounds Earth.
20. a group of atoms joined together in a particular way.

1. all the living things on Earth.
2. when a liquid turns into a gas.
3. to try to make something new that solves a problem.
4. all of the liquid water and ice on Earth.
5. to put together multiple pieces of information in order to understand something.
6. what you can observe or measure about something that helps you figure out what it is.
7. when a gas turns into a liquid.
10. a supply of something that is useful.
12. matter that is made of only one kind of atom or molecule.
15. the stuff that things are made of.
17. the solid part of Earth.