Chemical and Physical Changes

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. Examples include baking a cake or burning wood.

Front

What is a physical change?

Back

A physical change is a process that alters the form or appearance of a substance but does not change its chemical composition. Examples include shredding paper or melting ice.

Front

Give an example of a chemical change.

Back

Baking cake batter in an oven is an example of a chemical change.

Front

Give an example of a physical change.

Back

Shredding a piece of paper is an example of a physical change.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into new substances with different properties.

Front

What happens to the substances in a physical change?

Back

In a physical change, the original substances remain the same, but their form or appearance changes.

Front

Is mixing blue and yellow liquids to make green a chemical or physical change?

Back

Mixing blue and yellow liquids to make green is a physical change.

Front

Is burning wood a chemical or physical change?

Back

Burning wood is a chemical change.

Front

What role does light play in photosynthesis?

Back

Light is used in photosynthesis to produce food in plants, which is a chemical change.

Front

Can a physical change be reversed?

Back

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