Physical & Chemical Reactions

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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

Example of a chemical change:

Back

Fireworks going off is a chemical change because it produces new substances and energy.

Front

Example of a physical change:

Back

A snowman melting is a physical change because it changes state from solid to liquid but remains water.

Front

What happens during oxidation?

Back

Oxidation is a chemical change where a substance combines with oxygen, often resulting in rusting of metals.

Front

Is breaking a vase a physical or chemical change?

Back

Breaking a vase is a physical change because the material remains the same, just in smaller pieces.

Front

What is an example of a physical change in hair?

Back

Getting a haircut is a physical change because it alters the length of hair without changing its chemical structure.

Front

What is the difference between physical and chemical changes?

Back

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

Front

Can a chemical change be reversed?

Back

Some chemical changes can be reversed through chemical reactions, but many cannot.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting water.