Across
- 3. The air that surrounds Earth
- 4. When a liquid turns into a gas
- 5. All of the liquid and frozen water on Earth
- 6. A group of atoms put together in a specific way
- 8. A group of parts that work together
- 9. The part of the atmosphere where weather is made
- 10. A description of how something works or why something works
- 11. A supply of something that is useful
Down
- 1. Water in the form of invisible gas
- 2. All the living things on Earth
- 7. When a gas turns into a liquid (think clouds)
- 10. A person who uses science knowledge to design something in order to solve a problem