Across
- 1. required to start a chemical reaction
- 5. heat removed from a substance to change its state.
- 7. a type of change that completely alters a substance
- 8. Heat added to a substance to change its state.
- 9. an example of physical change of matter that creates a solution.
- 10. a process by which we remove enough heat energy to change a liquid into a solid due to a decrease in temperature
- 11. a physical process where heat energy is added to a solid substance causing it to turn into a liquid.
Down
- 2. many physical and chemical changes are affected by_____________.
- 3. occurs when liquid changes into a gas due to an increase in temperature
- 4. the process of a gas turning back into a liquid due to a decrease in temperature
- 6. a type of change that only changes the size, shape, or state of matter.