U1S7 Chemical Properties

Physical Science

What is a chemical property?

A characteristic of matter that describes its ability to change into a different substance.

What is a chemical change?

A change in matter that results in a change in its identity and properties.

What is reactivity?

The ability of a substance to combine chemically with another substance.

What is combustibility?

The ability of a substance to burn.

What do chemical properties describe?

They describe how matter can change into different substances.

How can you observe the chemical properties of a substance?

You must try to change it into another substance.

Give an example of combustibility.

Wood in a campfire or matches burning.

Give an example of reactivity.

Rusting of iron when it reacts with oxygen.

What happens in a chemical change?

New substances with different properties are formed, and the change cannot be reversed by physical changes.

What are some signs of a chemical change?

Production of gas, change in color, change in odor, or production of light or heat.

Can chemical changes be reversed by physical means?

No, they cannot.