PS.5.1.2 — Changes in Matter

Is boiling water a physical or chemical change?

• A physical change—the water changes state from liquid to gas but remains H₂O.

• A chemical change—the water transforms into hydrogen and oxygen gas.

• A physical change—the water changes color and taste.

• A chemical change—the water becomes steam and loses its properties.

Tags

NGSS.MS-PS1-4

Is melting a physical or chemical change?

• A physical change—it does not create a new substance.

• A chemical change—it creates a new substance.

• A physical change—it alters the chemical composition.

• A chemical change—it involves a change in state.

Tags

NGSS.MS-PS1-4

Crushing a can—physical or chemical change?

• Physical change—the material stays the same.

• Chemical change—the material transforms into a new substance.

• Neither—a can is an inanimate object.

• Both—it's a combination of physical and chemical changes.

What is a chemical change?

• A change that creates a new substance with different properties. Example: rusting, burning.

• A change that only affects the physical properties of a substance.

• A change that occurs when a substance is mixed with another without any reaction.

• A change that can be easily reversed without altering the original substance.

Tags

NGSS.MS-PS1-5

What is an example of a chemical change in cooking?

• Baking a cake is a chemical change because it results in new substances being formed.

• Boiling water is a chemical change because it creates steam.

• Frying an egg is a physical change because the egg remains the same.

• Mixing sugar and water is a chemical change because it forms a new solution.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a physical change?

• A change that creates a new substance.

• A change that does not create a new substance. Example: melting ice, tearing paper.

• A change that only occurs in liquids.

• A change that involves a chemical reaction.

Is dissolving a physical or chemical change?

• A physical change—it does not create a new substance.

• A chemical change—it creates a new substance.

• A physical change—it alters the substance's chemical properties.

• A chemical change—it involves a change in state.

Tags

NGSS.MS-PS1-4

Is freezing water a physical or chemical change?

• A physical change—the water changes state from liquid to solid but remains H₂O.

• A chemical change—the water transforms into a different substance.

• A physical change—the water evaporates into vapor.

• A chemical change—the water becomes ice and loses its original properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What are signs of a chemical change?

• Color change, odor, temperature change, gas (bubbles) forming.

• Physical state change without any other signs.

• No observable changes in the substance.

• Only a change in color.

Tags

NGSS.MS-PS1-2