Physical and Chemical Changes, States of Matter

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 ice when it melts?

Back

When ice melts, it undergoes a physical change from a solid state to a liquid state, but it remains water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is when vinegar and baking soda are mixed, producing carbon dioxide gas.

Front

What occurs when heat is added to a solid?

Back

When heat is added to a solid, it may melt and change into a liquid.

Front

What is the process of freezing?

Back

Freezing is the process where a liquid turns into a solid as it loses heat.

Front

What is an example of melting?

Back

An example of melting is heating a block of ice until it turns into water.

Front

What happens to water when enough heat is removed?

Back

When enough heat is removed from water, it will freeze and become a solid.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

Front

What is an example of a physical change?

Back

An example of a physical change is stirring sugar into water until it dissolves.