| Term | Definition |
|---|
| solid | matter that has a definite shape and a definite volume |
| liquid | matter that has a definite volume but no definite shape |
| gas | matter that does not have a definite shape or definite volume |
| element | basic kind of matter made up of just one kind of atom |
| atom | smallest particle of an element that has the properties of that element |
| nucleus | the central part of an atom |
| chemical symbol | a shorthand way to represent the name of an element |
| matter | anything that takes up space and has mass |
| 4 states of matter | solid, liquid, gas, plasma |
| 3 basic parts of an atom | neutrons, protons, and electrons |
| nucleus | the central part of an atom |
| true | ice, liquid water, and water vapor can can change from one to another |
| helium | a gas which is made up of one kind of atom and is an element |
| 112 | different basic kinds of matter |
| plasma | matter that has no definite shape and no definite volume |
| plasma vs. gas | plasma has electrically charged particles |
| protons | a basic part of an atom that has positively-charged particles |
| neutrons | a basic part of an atom that have no electric charge |
| electrons | a basic part of an atom that has negatively-charged particles and are found in a cloud that continually moves around the nucleus |
| protons and neutrons | found in the center of an atom called the nucleus |
| mass | a measure of how much matter there is in an object |
| volume | the amount of space an object takes up |
| energy | the ability to make things change |
| physical property | a characteristic of matter that can be detected or measured with the senses |
| chemical property | how a kind of matter can change into other kinds of matter |
| compound | a substance made up of two or more elements that are chemically joined or linked |
| chemical formula | a group of symbols that make up a compound |
| mixture | matter made up of two or more substances |
| solution | a mixture in which the different particles of matter are spread evenly |
| alloy | a solution of two or more metals with properties of its own |
| melting | the change of state from a solid to a liquid |
| evaporation | the change of state from a liquid to a gas |
| condensation | the change of state from a gas to a liquid |
| physical change | the process in which the size, shape, or state of matter changes but no new substances are formed |
| molecule | a particle made up of two or more atoms, which may be alike or different |
| chemical change | a change in which one or more new substances form |
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