Matter

1. A substance formed when two or more elements are chemically combined.
2. A pure substance consisting of only one type of atom
8. an ionized gas where a significant portion of particles are electrically charged (ions and electrons)
9. A change in the form of a substance, but not its chemical composition.
13. is defined as the capacity to do work or cause change
15. A combination of two or more substances that are not chemically bonded.
16. A homogeneous mixture where one substance is dissolved in another.
18. A group of two or more atoms held together by chemical bonds.
19. The temperature at which a solid changes to a liquid.
20. The mass per unit volume of a substance.

1. A change that involves the formation of new substances with different chemical properties
3. the smallest unit of an element
4. The amount of space an object occupies.
5. No definite shape or volume, expands to fill its container
6. A pure substance consisting of only one type of atom.
7. scale based on 0° for the freezing point of water and 100° for the boiling point of water
10. the process whereby heat changes something from a solid to a liquid
11. the withdrawal of heat to change something from a liquid to a solid
12. The temperature at which a liquid changes to a gas.
14. The amount of matter in an object.
17. a quality that makes things float in water