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, density, or melting point.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into a new substance, such as flammability or reactivity with acid.

Front

Give an example of a physical property.

Back

The boiling point of water is 100°C at sea level.

Front

Give an example of a chemical property.

Back

Iron rusting when exposed to oxygen and moisture.

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.

Front

What is a chemical change?

Back

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

Front

Is dissolving sugar in water a physical or chemical change?

Back

Physical change, because the sugar can be recovered by evaporating the water.

Front

Is the reaction of vinegar and baking soda a physical or chemical change?

Back

Chemical change, because it produces new substances, including carbon dioxide gas.

Front

What happens to the properties of a substance during a physical change?

Back

The properties may change, but the substance itself remains the same.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties change, and new substances are formed.