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. Examples include changes in size, shape, or state of matter.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the rearrangement of atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which of the following is NOT an example of a physical change?

Back

Rust is NOT an example of a physical change; it is a chemical change.

Tags

NGSS.MS-PS1-2

Front

What happens to the matter in a physical change?

Back

In a physical change, the matter begins and ends as the same substance.

Tags

NGSS.MS-PS1-4

Front

What happens to the matter in a chemical change?

Back

In a chemical change, the matter transforms into one or more 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 example of a physical change?

Back

Examples of physical changes include crumpling paper, sharpening a pencil, and freezing water.

Front

What is an example of a chemical change?

Back

Examples of chemical changes include rusting iron, burning wood, and baking a cake.

Tags

NGSS.MS-PS1-2

Front

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

Back

A physical change does not change the chemical composition of a substance, while a chemical change results in new substances being formed.

Tags

NGSS.MS-PS1-4

Front

What is an indicator of a chemical change?

Back

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

Tags

NGSS.MS-PS1-2