Chemical Reactions

5. reactions that absorb energy from the surroundings and use it during the chemical reaction
7. endothermic chemical reactions ___ the temperature of the surroundings
8. chemical reaction absorbing light energy to produce glucose and oxygen from carbon dioxide and water
10. a color change occurs when iron reacts with this other substance
11. observation that a chemical reaction might have occurred
14. ending substance after a chemical reaction
15. starting substance before a chemical reaction
16. burning is a chemical reaction that requires a ___ and oxygen.

1. exothermic chemical reactions ___ the temperature of the surrounding
2. you might see these when a gas is produced
3. burning is a reaction indicated by the production of this form of energy
4. during the electrolysis of water, this form of energy is absorbed and used
6. reactions that produce energy distribute it to the surroundings during the chemical reaction
9. rotting garbage is a chemical reaction that produces a change in ___
12. these break apart and rearrange during chemical reactions
13. substances ___ into other substances during a chemical reaction