PS.5.1.2 (5.P.2.3) #7: Schoolnet

Front

What is a physical change?

Back

A physical change is a change that occurs when the size, shape, appearance, or volume of a substance is altered without changing its composition.

Front

What is an example of a physical change?

Back

An example of a physical change is firewood getting wet.

Front

Why are ashes from a log evidence of a chemical change?

Back

The ashes cannot be put back together to create a log again, indicating a chemical change has occurred.

Front

What happens to water when it boils?

Back

When water boils, it changes from a liquid to a gas, which is an example of a physical change.

Front

What is an example of ice undergoing a physical change?

Back

Ice melting into water is an example of a physical change.

Front

What distinguishes a physical change from a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing water to make ice.

Front

What is the significance of the composition of a substance in physical changes?

Back

In physical changes, the composition of the substance remains the same, even though its form may change.

Front

What is an example of a reversible physical change?

Back

An example of a reversible physical change is water freezing into ice.

Front

What is an example of an irreversible physical change?

Back

An example of an irreversible physical change is breaking a glass.