| matter | anything that has mass and takes up space |
| states of matter | solid, liquid, and gas |
| plasma | ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric change |
| property | characteristic that describes matter |
| physical property | properties that can be observed without changing the matter into another kind of matter |
| chemical property | property that describes how one kind of matter changes into another form |
| oxidation | process in which minerals combine with oxygen to form new substances |
| combustion | the process of buring something |
| elment | substance that cannot be changed or separated into other kinds of substances |
| atom | smallest particle of an element that has characteristics of that element |
| nucleus | center of an atom which is made up of protons and neutrons |
| electron | moves around outside of nucleus and is negatively charged |
| proton | positively charged particle of an atom |
| compound | a substance formed when the atoms of two or more electrons join together chemically |
| mixture | two or more elements or compounds mixed together but not joined chemically |
| molecule | the smallest portion of a substance that has all the properties of that substance |