Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into 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

Burning paper is an example of a chemical change.

Front

Give an example of a physical change.

Back

Melting ice 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 different substances.

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 melting ice a reversible change?

Back

Yes, melting ice is a reversible change because the water can freeze again.

Front

Is burning wood a reversible change?

Back

No, burning wood is not a reversible change because it creates ash and smoke, which cannot be turned back into wood.

Front

What is an example of a physical change that cannot be reversed?

Back

Tearing a piece of paper is a physical change that cannot be reversed.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in new substances, while a physical change does not change the chemical identity of the substance.