Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change occurs when two or more substances combine to form a new chemical substance.

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.

Front

What happens to ice when it melts in coffee?

Back

The melting of ice in coffee is a physical change because the water can be frozen again.

Front

What is the definition of boiling point?

Back

The boiling point is the temperature at which a liquid turns into vapor.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity.

Front

Give an example of a chemical change.

Back

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

Front

Give an example of a physical change.

Back

An example of a physical change is the melting of ice.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.

Front

What is an example of a physical property?

Back

An example of a physical property is color.

Front

What is the significance of observing physical properties in substances?

Back

Observing physical properties helps in identifying and classifying substances.