4A Chemical and physical properties and 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, smell, boiling point, and density.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to undergo a specific chemical change, such as flammability, reactivity with acids, and oxidation states.

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, freezing, or cutting.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, indicated by color change, gas production, or temperature change, such as rusting or souring of milk.

Front

Give an example of a physical property.

Back

The smell of coffee.

Front

Give an example of a chemical property.

Back

Gold's inability to react with oxygen.

Front

Give an example of a physical change.

Back

Slicing a pellet of sodium metal into two pieces.

Front

Give an example of a chemical change.

Back

Milk turning sour.

Front

What does flammability indicate?

Back

Flammability is a chemical property that indicates a substance's ability to catch fire and burn.

Front

How can you identify a physical change?

Back

A physical change can be identified if the substance retains its original properties and no new substances are formed.