Physical and Chemical Properties

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. 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 burning, rusting, and digestion.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

What does it mean if a substance is flammable?

Back

If a substance is flammable, it means it can easily catch fire and burn.

Front

What is toxicity?

Back

Toxicity refers to the degree to which a substance can harm humans or animals; it means to be poisonous.

Front

What happens during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in new substances.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the rusting of iron.

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 identity, while a chemical property can only be observed during a chemical reaction.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is a physical change.