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Chapter 2 vocab

8th grade science

TermDefinition
matter anything that has mass and takes up space
substance a single kind of matter that is pure (specific makeup and properties)
physical property a characteristic that can be observed using the senses
element a pure substance that cannot be broken down into any other substance by physical or chemical means
atom the basic particle from which elements are made
chemical bond force of attraction between two atoms
molecules groups of two or more atoms held together by chemical bonds
compound a pure substance made of two or more elements chemically combined in a set ratio
mixture made of two or more substances not chemically combined
heterogeneous mixture different parts of the mixture are visible
homogeneous mixture the different parts of the mixture are not visible and it is uniform
weight measure of the force of gravity on an object
mass the amount matter in an object
density mass of a material in a given volume
volume amount of space matter occupies
chemical change a change in matter that produces one or more new substances with new properties
law of conservation of mass the fact that matter is not created nor destroyed in any chemical or physical change
Created by: Science4u
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