Across
- 3. water that has been used and now contains harmful substances.
- 6. a person who uses science knowledge to design something to solve a problem
- 7. the solid part of the earth
- 8. a supply of something that is useful.
- 9. the air that surrounds Earth.
- 11. a group of part that work together.
- 12. process of a liquid turning into a gas
Down
- 1. all living things on Earth.
- 2. water in the form of inviable gas
- 4. process of a gas turning into gas.
- 5. the process in which substances change into different substances.
- 10. all liquid water and ice on Earth.