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Vocabulary from Unit 4 of Indiana Grade 8 Interactive Science.


Has a definite volume and definite shape


Has a definite volume and indefinite shape


Has an indefinite volume and indefinite shape

Physical Change

A change that alters the form or appearance of a material but does not make the material into another substance

Chemical Change

A change in which one or more substances combine or break apart to form new substances


Changing from a solid to a liquid


A substance that enters into a chemical reaction


A substance formed as a result of a chemical reaction


A solid that forms from a solution during a chemical reaction


A reaction that releases energy, usually in the form of heat


A reaction that absorbs energy


Changing from a liquid to a solid


Anything that has mass and takes up space


Something that sparks or accelerates a chemical reaction


A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction

Chemical Equation

A short, easy way to show a chemical reaction, using symbols

Chemical Reaction

A reaction where a new substance is formed or a substance is broken down into others


Changing from a gas to a liquid


Changing from a liquid to a gas


A chemical reaction in which two or more simple substances combine to form a new, more complex substance


A chemical reaction that breaks down compounds into simpler products


A chemical reaction in which one element replaces another in a compound or when two elements in different compounds trade places

Conservation of Mass

The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change.

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