Across
- 3. what is formed when gases are released in a solution during a chemical reaction
- 5. what is formed when a solid appears in a liquid solution during a chemical reaction
- 7. this forms on metal due to a reaction with oxygen in the air
- 10. a chemical reaction that releases heat, making a substance hotter
- 12. a change that alters the chemical composition of a substance
Down
- 1. a change that alters the appearance of substance but not its chemical composition
- 2. another word for burning
- 4. a chemical reaction that absorbs heat, making a substance colder
- 6. this can change in both physical and chemical change; it is a measure of how hot or cold a substance is
- 8. this can change in both physical and chemical changes; this refers to how a substance reflects different wavelengths of light
- 9. how the surface of a substance feels
- 11. this refers to how a chemical reacts to oxygen