Across
- 2. matter with a fixed volume and shape
- 4. a measure of the average kinetic energy of the atoms in a system
- 6. a change in matter that does not affect its chemical composition
- 8. a fundamental principle of science stating that matter cannot be created or destroyed in a closed system
- 10. a state of matter with a defined volume but no defined shape
Down
- 1. chemical reaction that gives off heat energy
- 3. energy in the form of heat
- 5. a process that changes substances into new substances
- 7. a state of matter without any defined volume or shape
- 9. a chemical reaction that absorbs heat energy