Physical Science Review

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What are nonmetals?

Back

Nonmetals are elements that are generally poor conductors of heat and electricity and are not malleable or ductile.

Front

What are metals?

Back

Metals are elements that are good conductors of heat and electricity, malleable, and ductile.

Front

What is an example of a good conductor of electricity?

Back

Copper (Cu) is an example of a good conductor of electricity.

Front

What happens during boiling?

Back

During boiling, a liquid changes to a gas at its boiling point, which is a physical change.

Front

What happens during melting?

Back

During melting, a solid changes to a liquid at its melting point, which is a physical change.