TEST PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of matter changes, but its chemical composition remains the same. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and cooking.

Front

Is burning wood a physical change?

Back

No, burning wood is a chemical change because it transforms the wood into ash and gases.

Front

What happens during rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide (rust).

Front

What is evaporation?

Back

Evaporation is the process by which liquid water changes into water vapor (gas) when it is heated.

Front

Is evaporation a physical or chemical change?

Back

Evaporation is a physical change because it does not alter the chemical composition of water.

Front

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

Back

A physical property can be observed without changing the substance's chemical identity (e.g., color, melting point), while a chemical property describes a substance's ability to undergo a chemical change (e.g., flammability, reactivity).

Front

What is an example of a physical property?

Back

An example of a physical property is the color of a substance, such as the blue color of copper sulfate.

Front

What is an example of a chemical property?

Back

An example of a chemical property is the ability of iron to rust when exposed to moisture.

Front

In a physical change, does the makeup of matter change?

Back

No, in a physical change, the makeup of matter does not change; only its form or appearance changes.