Across
- 1. a person who uses science knowledge to design something in order to solve a problem
- 4. a description of how something works or why something happens
- 6. to try to make something new that solves a problem
- 8. reaction a process in which substances change into different substances
- 9. all the living things on Earth
- 10. all the liquid water and ice on Earth
Down
- 1. when a liquid turns into a gas
- 2. when a gas turns into a liquid
- 3. the air that surrounds Earth
- 5. things that engineers think about and test in order to know how well something solves a problem
- 7. the solid/land part of Earth