Across
- 3. To try to make something new to solve a problem
- 5. A group of parts that work together
- 7. What you can observe or measure about something that helps you figure out what it is
- 9. A group of atoms joined together in a particular way
- 10. A supply of something that is useful
- 11. All the living things on the Earth
- 12. When a liquid turns into a gas
- 14. A person who uses science knowledge to design something in order to solve a problem
- 16. A description of how something works or why something happens
- 17. All of the liquid water and ice on Earth
- 18. To put together multiple pieces of information in order to understand something
Down
- 1. The air that surrounds the Earth
- 2. When gas turns into a liquid
- 4. To try something again using what you learned the last time you tried it
- 6. Water that has been used and now contains
- 8. Matter that is made of only one kind of atom or molecule
- 9. The stuff that things are made of
- 13. substances
- 15. The solid part of the Earth