Physical and Chemical 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 change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Give an example of a chemical change.

Back

Fireworks exploding is an example of a chemical change.

Front

What happens to a nail when it rusts?

Back

When a nail rusts, it undergoes a chemical change, forming iron oxide.

Front

What is sour milk an example of?

Back

Soured milk is an example of a chemical change.

Front

What occurs when an egg is fried?

Back

Frying an egg is an example of a chemical change.

Front

What does a rusty bike indicate?

Back

A rusty bike shows a chemical change due to the formation of rust.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as melting ice back into water.

Front

Can a chemical change be reversed?

Back

Most chemical changes cannot be easily reversed, as new substances are formed.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.