Across
- 2. compounds have (______) properties than the elements that make up.
- 6. when a liquid (), it changes to a gas rapidly.
- 8. mass is often measured in what?
- 9. An (_____) is the smallest unit of an element that retains the properties of the element
- 10. liquid in a() expands or contracts with changes in temperature.
- 13. materials () as they get hotter.
- 16. petroleum is a complex mixture of (_______).
- 17. A measure of the amount of matter in an object is what?
- 18. (________) comes from petroleum.
- 19. materials ()as the get cooler.
Down
- 1. the groups in Mendeleyev's table after the periodic changes found in the elements' ()
- 3. the melting point is also called the () point.
- 4. the basic building blocks of all matter are what?
- 5. A measure of how much space a sample of matter takes up is what?
- 7. when heat is absorbed by a solid, the molecules vibrate ().
- 9. materials with very low density and relatively great strength,called (),are very good insulator against heat is what?
- 11. particals that contain more than one atom joined together are called()
- 12. when a liquid (), it gradually changes to a gas.
- 14. adding or removing (____)makes substances change from one state to another.
- 15. the (_____) of an object is a measure of the force of gravity between earth and the object is what?