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Matter and Change

Vocabulary and Important Concepts for Matter and Change Unit

TermDefinition
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
Created by: zmaye33
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