Across
- 2. The amount of one material in a certain volume of another material
- 5. change- Changes the physical appearance but not the actually substance
- 6. Property- A characteristic of a substance that can be observed
- 8. System- Matter can enter or escape the system
- 10. System- No matter is allowed to enter or leave
- 12. Property- The ability to change into different substances
- 15. Anything that has mass or occupies space.
- 17. reaction- A reaction that absorbs energy in the form of heat.
- 19. Two or more substances combine to form a new substance.
- 21. A rapid reaction between oxygen and fuel that results in a fire.
- 22. energy- The minimum amount of energy needed.
- 23. Releases energy when it burns.
Down
- 1. How many atoms or molecules are represented in a reaction
- 3. When one element replaces another.
- 4. reaction- Substances undergo chemical changes that result in a new substance
- 6. A solid that forms from a solution during a chemical reaction
- 7. Equation- A short easy was to show a chemical reaction using symbols
- 9. of mass- Matter isn’t created or destroyed during a chemical reaction
- 11. A chemical that breaks down into simpler substances.
- 13. A material that increases the rate of reaction
- 14. The studies of properties of matter and how matter changes.
- 16. reaction- A reaction that releases energy in the form of heat.
- 18. A substance that enters into a chemical reaction
- 20. The result of a chemical reaction