Across
- 4. changes that occur when a substance combines with another to form a new substance
- 9. properties that can be observed or measured without changing the composition of matter
- 11. the direction in which energy flows when two objects are in thermal contact
- 13. a substance that cannot be separated or broken down into simpler substances by chemical means; a pure substance
- 16. 1000 calories
- 18. a principle stating that energy cannot be created or destroyed
- 20. a unit of energy in the SI system
Down
- 1. the amount of heat required to raise the temp. of one gram of water
- 2. changes affecting the form of a chemical substance, but not its chemical composition
- 3. anything that has mass and volume
- 5. mixtures that are not uniform in composition
- 6. a chemical reaction that takes in energy in the form of heat
- 7. a chemical reaction that releases energy in the form of heat or light
- 8. properties that may only be observed and measured by performing a chemical change or chemical reaction
- 10. amount of heat per unit mass required to raise the temperature by one degree celsius
- 12. a substance made up of atoms of 2 or more different elements joined by chemical bonds; a pure substance
- 14. energy that flows between two samples of matter due to their difference in temperature
- 15. process of measuring the heat of chemical reactions or physical changes as well as heat capacity
- 17. 1000 joules
- 19. mixtures that are uniform in compisition (also called heterogenous)