Across
- 4. A ______ substance is formed during a chemical change.
- 6. A thin green layer of corrosion that forms over the copper on a penny or Statue of Liberty.
- 8. a chemical change where 2 liquids mix together and a solid forms
- 9. When oxygen and iron combine it creates a brown substance called ___________.
- 11. When mixing baking soda with vinegar what type of thermal change was it? Warmer or cooler.
Down
- 1. An _____________ color change is an indicator that a chemical change has occurred.
- 2. When wood or paper _______ it gives off heat and creates a new substance called ashes.
- 3. What type of change is cutting paper or chewing food?
- 5. type of chemical change food goes through in your stomach
- 6. The scientific term for "heat" energy.
- 7. When a _____ is produced you will see bubbles or hear fizzing.
- 10. When milk expires and _______ it is a chemical change.