Physical and Chemical Properties and Changes

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with new chemical properties.

Front

What is a physical change?

Back

A physical change is a process that alters one or more physical properties of a substance without changing its chemical composition.

Front

Is rusting of iron a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical property?

Back

Color, odor, melting point, boiling point, density.

Front

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

Back

The identity of the substance remains the same.

Front

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

Back

The identity of the substance changes, resulting in new substances.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Physical change.

Front

What is an example of a chemical property?

Back

Reactivity with acid, flammability, ability to rust.

Front

Can physical properties be observed without changing the substance?

Back

Yes, physical properties can be observed without changing the identity of the substance.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition, while chemical changes do.