Across
- 3. the starting materials in a chemical reaction
- 5. a chemical reaction that absorbs thermal energy from its surroundings (it feels cold to touch)
- 8. a change when no new substance is formed
- 9. a change when a new substance is formed
Down
- 1. the burning of a fuel, where it reacts with oxygen to create heat and light
- 2. a process in which one or more reactants are converted to one or more different substances
- 4. the process by which food, in the form of sugar (glucose), is transformed into energy within cells
- 6. a substance that is formed as the result of a chemical reaction
- 7. a chemical reaction that produces heat (it feels hot to touch)