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.

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.

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

Front

Is burning coal a chemical or physical change?

Back

Chemical change.

Front

What happens to green bananas as they ripen?

Back

They undergo a chemical change and turn yellow.

Front

What is an example of a physical change?

Back

Breaking glass is an example of a physical change.

Front

What happens when you bake a cake?

Back

Baking a cake is a chemical change because new substances are formed.

Front

Can a chemical change be reversed?

Back

Most chemical changes cannot be easily reversed.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, like melting ice.

Front

What is an example of a chemical change in cooking?

Back

Cooking food, like frying an egg, is a chemical change.