Physical changes

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 chocolate when it melts?

Back

When chocolate melts, it changes from a solid to a liquid due to heat.

Front

What are physical properties?

Back

Physical properties are characteristics of a substance that can be observed or measured without changing the substance's identity, such as color, shape, and mass.

Front

What happens to ice when it is heated?

Back

Ice melts and changes from a solid to a liquid when heated.

Front

What is an example of a physical change?

Back

Examples of physical changes include melting ice, folding paper, and breaking glass.

Front

How does heat affect the state of matter?

Back

Heat can cause a solid to become a liquid (melting), a liquid to become a gas (evaporation), or a gas to become a liquid (condensation).

Front

What is the melting point?

Back

The melting point is the temperature at which a solid becomes a liquid.

Front

What happens to the shape of paper when it is folded?

Back

The shape of the paper changes, but its chemical composition remains the same.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing water back into ice.

Front

What is an example of a reversible physical change?

Back

An example of a reversible physical change is freezing and melting water.