Physical and Chemical Changes

Front

What is rust?

Back

Rust is a reddish-brown substance that forms when iron reacts with oxygen and moisture in the air.

Front

What type of change results in a new substance?

Back

A chemical change results in a new substance.

Front

What is a physical change?

Back

A physical change is a change that does not result in a new substance, such as melting ice or tearing paper.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances, such as burning wood.

Front

What is an example of a sign of a chemical change?

Back

Smoke is a sign of a chemical change, such as when wood burns.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical composition remains the same.

Front

Can you name a common example of a physical change?

Back

Melting ice is a common example of a physical change.

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 chemical change?

Back

Rusting of iron is an example of a chemical change.

Front

What is the process of decay?

Back

Decay is the process of decomposition, where organic matter breaks down into simpler substances.