Across
- 2. the force that hold atoms together
- 5. change a change in matter that does not affect is chemical comparison
- 8. a substance that is formed during chemical reaction
- 9. change of substance into something new
- 10. the amount of space that an object occupies
- 13. a pure substance that can not be broken
- 16. a characteristic that can be observed
- 18. a chemical reaction that absorbs heat energy
Down
- 1. the ability to do work
- 3. a combination of substance that can be separated from each other
- 4. the amount of matter in an object
- 6. the treanser of the thermal energy
- 7. the smallest unit of an element in a molecule
- 11. two or more atoms joined together
- 12. chemical reaction that gives of heat energy
- 14. a measure of the average kinetic energy
- 15. material that has mass and takes up space
- 17. a pure substance when two or more substances combine