Across
- 2. Scientists use a quantity known as _____ to measure force
- 5. A measure of the amount of matter in an object
- 8. Each ____ has its own density
- 9. A measure of how tightly packed matter is is called
- 10. what Comes from petroleum?
- 13. Opposite poles ____ one another
- 14. Solids keep their what?
- 16. Metals with very low density and relativity great strength, called ______, are very good insulators against heat
- 20. We know of how many elements
Down
- 1. Compounds have _____ properties than the elements that make them up
- 3. The basic building blocks of all matter
- 4. A ____ measures mass
- 6. The tiny, very dense body in the atoms center is called
- 7. When a liquid ___,it changes to a gas rapidly
- 8. About 3/4 elements of the elements are
- 11. A formula contains numbers below the elements called what?
- 12. Mass is often measured in what?
- 15. Particles that can contain more than just one atom joined together are called?
- 17. The object's ability to float
- 18. Anything that takes up space
- 19. The liquid in a _____ expands or contracts with changes in temperature