Earth System Glossary

5. The stuff that things are made of
7. When a gas turns into a liquid
9. The solid part of Earth
10. Water in the form of invisible gas
11. To try and make something new that solves a problem
13. A person who uses science knowledge to design something in order to solve a problem
16. The air that surrounds Earth
19. Water that has been used and now contains harmful substances
20. What you can observe or measure about something that helps you figure out what it is

1. All the living things on Earth
2. Matter that is made of only one kind of atom or molecule
3. Things that engineers think about and test in order to know how well something solves a problem
4. A supply of something that is useful
6. All of the liquid water and ice on Earth
8. To put together multiple pieces of information in order to understand something
12. A group of parts that work together
14. When a liquid turns into a gas
15. Reaction A process in which substances change into different substances
17. A group of atoms joined together in a particular way
18. A description of how something works or why something happens