Across
- 3. a way to show a chemical change.
- 5. A substance that undergoes the chemical change.
- 8. is any change that alters the form or appearance of a substance.
- 9. a new substance that forms.
- 13. is a number place in front of the chemical formula.
- 14. a matter can enter form or escape to the surroundings.
- 15. when one element replaces another element.
- 17. increase the reaction rate by lowering that activation.
- 18. a catalyst that helps reactions occur at our body temperature.
- 19. a solid that forms from liquids during a chemical reaction.
Down
- 1. the amount of a substance in a given volume.
- 2. more energy is required to break then bonds of the reactants then is released.
- 3. a change in matter that produces one our more substances.
- 4. the states during a chemical reaction matter is not created or destroyed.
- 6. minimum amount of energy needed to start a chemical reaction.
- 7. a reaction when compounds break down.
- 10. when two or more elements combine to make a more complex substance.
- 11. the energy released as the product form is greater than the energy required.
- 12. a matter does not enter or leave.
- 16. a material used to decrease the rate of a chemical reaction.