Across
- 4. a response from doing something
- 8. something made of two or more elements
- 9. the amount of space something takes up
- 11. a substance that cannot be broken down into another substance
- 13. to release heat into the surroundings
- 14. a substance made by mixing another substance
- 15. power from physical or chemical resources
- 16. something increasing the rate of a reaction
- 17. the amount of material something contains
Down
- 1. a group of two or more atoms
- 2. something that undergoes change during a reaction
- 3. the result of something
- 5. a join of something
- 6. the smallest particle in the universe
- 7. two things sticking together
- 10. what a physical product is made of
- 12. a branch of science
- 13. to take in heat from the environment