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Matter and Change
Vocabulary and Important Concepts for Matter and Change Unit
Term | Definition |
---|---|
Matter | anything that has mass and volume |
Mass | the measure of the amount of matter |
Weight | the measure of gravitational pull on a substance |
Solid | has a definite volume and shape; strong attractive forces holding it together |
Precipitate | solid formed from mixing two liquids |
Liquid | has a definite volume but not shape; move rapidly to temporarily overcome strong attractive forces |
Supernatant | (of a liquid) - upper layer of fluid above a solid found after a mixture has settled |
Gas | does not have a definite volume or shape; little to no attractive forces (none when far apart) |
Plasma | 4th state of matter; hot ionized gas; has high temperature in physical state in which atoms lose most of their electrons (sun, stars) |
Atom | smallest particle of matter, which maintains the chemical identity of the element |
Element | a pure substance, made of only one type of atom; cannot be separated unless by using a nuclear reaction |
Compound | substance made up of two or more different types of atoms; cannot be separated by physical means; chemically combined; pure substance with a fixed composition (chemical formula) and are always homogeneous |
Mixture | combination of two or more kinds of matter that retains its own identity and properties; can be separated into their components by chemical OR physical means |
Homogeneous | solutions; have a uniformed composition (all the same) |
Heterogeneous | not uniformed |