Physical and Chemical 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. 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 rusting, burning, and cooking.

Front

What happens to water when it evaporates?

Back

When water evaporates, it changes from a liquid to a gas due to heat.

Front

What happens to water during condensation?

Back

During condensation, water vapor cools and changes back into liquid water.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is cooking an egg a physical or chemical change?

Back

Cooking an egg is a chemical change.

Front

What is an example of a physical change in nature?

Back

An example of a physical change in nature is the melting of snow.

Front

What is an example of a chemical change in nature?

Back

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

Front

What occurs during the process of freezing?

Back

During freezing, a liquid turns into a solid as it loses heat.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at the surface of a liquid at any temperature, while boiling occurs throughout the liquid at a specific temperature.