Chemical Reactions

Front

What is sublimation?

Back

The process of a solid turning directly into a gas without passing through the liquid state.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What type of reaction occurs when ice melts?

Back

Endothermic reaction, as it absorbs heat from the surroundings.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change, as it does not alter the chemical composition of the butter.

Front

What is thermal energy?

Back

The motion of atoms or molecules within a substance, related to temperature.

Tags

NGSS.MS-PS1-4

Front

What is an example of an exothermic reaction?

Back

Burning of wood, which releases heat and light.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings, usually in the form of heat.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What happens during a chemical change?

Back

The chemical composition of a substance changes, resulting in the formation of new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition, while a chemical change does.

Tags

NGSS.MS-PS1-4

Front

What is evaporation?

Back

The process by which liquid turns into vapor at temperatures below its boiling point.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What is deposition?

Back

The process of a gas turning directly into a solid without passing through the liquid state.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4