Chemical vs Physical Changes

Front

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

Back

A chemical change results in the formation of new substances with different properties, while a physical change does not alter the chemical composition of a substance.

Tags

NGSS.MS-PS1-2

Front

What is a chemical clue?

Back

A chemical clue indicates that a chemical change has occurred, such as the formation of a new substance, color change, gas production, or heat release.

Tags

NGSS.MS-PS1-2

Front

What is a physical clue?

Back

A physical clue indicates that a physical change has occurred, such as changes in state (solid, liquid, gas), shape, or size without altering the substance's chemical composition.

Tags

NGSS.MS-PS1-4

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change, as it produces ash, smoke, and gases, which are new substances.

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, as it changes from solid to liquid without altering its chemical composition.

Tags

NGSS.MS-PS1-4

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the bonds between atoms in molecules are broken and new bonds are formed, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the molecules during a physical change?

Back

During a physical change, the arrangement of molecules may change (e.g., from solid to liquid), but the molecules themselves remain the same.

Front

Is dissolving sugar in water a chemical or physical change?

Back

Dissolving sugar in water is a physical change because the sugar molecules remain intact and can be recovered by evaporation.

Tags

NGSS.MS-PS1-2

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

What is an example of a physical change that involves a change in state?

Back

Boiling water is an example of a physical change that involves a change in state from liquid to gas.

Tags

NGSS.MS-PS1-4