Science 8 Unit 4 Vocabulary

Front

Reactant

Back

A substance that takes part in and undergoes change during a reaction.

Tags

NGSS.MS-PS1-2

Front

Endothermic

Back

A process or reaction that absorbs energy in the form of heat.

Tags

NGSS.HS-PS1-4

Front

Product

Back

A substance that is formed as the result of a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Exothermic

Back

A process or reaction that releases energy in the form of heat.

Tags

NGSS.HS-PS1-4

Front

Subscript

Back

A number written slightly below and to the right of a chemical symbol in a formula, representing the number of atoms of the element in the compound.

Tags

NGSS.MS-PS1-1

Front

Chemical Equation

Back

A symbolic representation of a chemical reaction in the form of symbols and formulas.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

Coefficient

Back

A number placed in front of a chemical formula in an equation to balance the equation.

Front

Ion

Back

An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Front

Conservation of Matter

Back

A principle stating that mass cannot be created or destroyed in a closed system through ordinary chemical reactions or physical transformations.

Tags

NGSS.MS-PS1-5

Front

Yield

Back

The amount of product obtained in a chemical reaction.