Across
- 3. three-fourths of elements are what?
- 7. the last state of mater is...
- 8. compounds can only be broken up by what?
- 11. one state of matter is...
- 13. another state of mater is...
- 14. what comes from petroleum?
- 17. an object's weight depends on it's what in the universe?
- 18. each what has it's own density?
- 19. what are the basic building blocks of matter?
- 20. something that has mass and takes up space is what?
Down
- 1. mass is often measured in what?
- 2. petroleum is a complex mixture of what?
- 4. on a magnet opposite poles do what?
- 5. what has north and south poles?
- 6. the melting point is also called the what point?
- 9. metals like copper are good at what?
- 10. an object's ability to float is called what?
- 12. solids keep their what?
- 15. how many elements are there?
- 16. what measures mass?