Across
- 2. pure substance that cannot be broken down
- 4. transfer of thermal energy
- 7. matter changing that doesn't affect chemical compound
- 10. a measure of the average kinetic energy
- 11. the amount of space an object occupies
- 12. molecules of same substances sticking together
- 14. the substances formed during a chemical reaction
- 15. forces that hold atoms together
- 17. material that has mass and takes up some amount of space
- 18. a process that changes substances to a new substance
Down
- 1. a substance that increases rate of a chemical reaction
- 3. a chemical reaction that absorbs heat
- 5. a chemical combination of two or more elements
- 6. the amount of matter in an object
- 8. the smallest unit of matter(makes up matter)
- 9. substances present before a chemical reaction
- 13. chemical reaction that gives off heat
- 16. a combination of substances that can be separated