FLASHCARD Physical and Chemical Changes

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity, such as color, odor, melting point, and density.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into different substances, such as reactivity with oxygen or acidity.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice or dissolving sugar in water.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rusting iron or burning wood.

Front

Example of a physical property:

Back

Copper can be stretched into thin wires.

Front

Example of a chemical property:

Back

Hydrofluoric acid is poisonous.

Front

What happens to an apple when it turns brown in the presence of oxygen?

Back

It undergoes a chemical change due to oxidation.

Front

Is the tarnishing of copper a physical or chemical change?

Back

It is a chemical change.

Front

What are some indicators of a chemical change?

Back

Color change, gas production, formation of a precipitate, and temperature change.

Front

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

Back

A physical change does not alter the substance's chemical identity, while a chemical change results in new substances being formed.