Across
- 2. transfer of heat/energy out of the air; gas to a liquid
- 3. the very outer energy level of an atom has 8 electrons
- 5. the amount of mass per unit of volume
- 6. solid to a gas without becoming a liquid first; dry ice in a fog machine
- 7. two or more elements joined together
- 9. has no shape and no volume
- 13. has a definite shape and definite volume
- 14. neutral charge of an atom
- 15. transfer of heat/energy into an object; solid to a liquid
- 17. negative charge of an atom
- 19. transfer of heat/energy out of an object; liquid to a solid
Down
- 1. gas to a solid without becoming a liquid first; frost on a window
- 4. a change in matter where something new is made; rust on a car
- 8. a change in matter where nothing new is made; cutting paper
- 10. smallest unit of matter
- 11. anything that has mass and takes up space
- 12. how much space an object takes up
- 16. positive charge of an atom
- 18. has a definite volume, but not definite shape