Across
- 1. measure of how much space a sample of matter takes up is?
- 5. mass is often measured in what?
- 8. what comes from petroleum?
- 9. the number of what in an atom determines what element it is?
- 10. what is the quantity that scientists use to measure force?
- 11. an object's ability to float is called what?
- 14. each what has it's own density?
- 16. how many elements are there?
- 17. on a magnet opposite poles do what?
- 20. compounds can only be broken up by what?
Down
- 2. an object's weight depends on it's what in the universe?
- 3. a measure of the amount of matter in an object is what?
- 4. petroleum is a complex mixture of what?
- 6. metals like copper are good at what?
- 7. something that has mass and takes up space is what?
- 12. what are the basic building blocks of matter?
- 13. what has north and south poles?
- 15. three-fourths of an elements are what?
- 18. what measures mass?
- 19. a measure of how tightly packed a sample of matter is called.