physical and chemical changes

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, involving a rearrangement of atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Tags

NGSS.MS-PS1-4

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the chemical composition of a substance during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition of a substance during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is dissolving salt in water a physical or chemical change?

Back

Dissolving salt in water is a physical change.

Front

What is an indicator of a chemical change?

Back

An indicator of a chemical change can include color change, gas production, or the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

What is the difference between reversible and irreversible physical changes?

Back

Reversible physical changes can be undone (e.g., freezing and melting), while irreversible changes cannot be easily reversed (e.g., breaking glass).

Front

What is an example of a reversible physical change?

Back

Melting and refreezing water is an example of a reversible physical change.

Tags

NGSS.MS-PS1-4