Changes in Matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting ice or breaking a glass.

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 iron or burning wood.

Front

What happens to water when it freezes?

Back

When water freezes, it changes from a liquid state to a solid state, forming ice.

Front

What happens to water when it boils?

Back

When water boils, it changes from a liquid state to a gas state, forming water vapor.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor, usually due to heat.

Front

What is condensation?

Back

Condensation is the process by which water vapor cools and changes back into liquid water, often forming droplets.

Front

What is melting?

Back

Melting is the process of a solid turning into a liquid when heat is applied.

Front

What is freezing?

Back

Freezing is the process of a liquid turning into a solid when it loses heat.

Front

What is decaying?

Back

Decaying is the process of organic matter breaking down into simpler substances, often due to the action of microorganisms.

Front

What is the effect of temperature on chemical changes?

Back

Temperature can affect the rate of chemical changes; higher temperatures often increase the rate of reactions.