Chemical Reactions

Front

What holds atoms together in molecules and compounds?

Back

Bonds

Front

In a chemical reaction, what are the bonds that are broken called?

Back

Reactants

Tags

NGSS.MS-PS1-1

Front

What is an atom?

Back

The smallest part of an element.

Front

What happens to the mass of materials in a closed container during a chemical reaction?

Back

The mass will stay the same.

Tags

NGSS.MS-PS1-5

Front

What is a chemical change?

Back

A change that results in the formation of new substances, such as a copper penny turning green.

Tags

NGSS.MS-PS1-2

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What are products in a chemical reaction?

Back

The new substances formed as a result of the reaction.

Tags

NGSS.MS-PS1-2

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed.

Tags

NGSS.HS-PS1-5