Chemical and Physical Changes

Front

What is a chemical change?

Back

A process that leads to the formation of one or more new substances with different properties.

Front

What is a physical change?

Back

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

Front

What is matter?

Back

Anything that has mass and takes up space.

Front

What are atoms?

Back

The basic building blocks of matter, consisting of protons, neutrons, and electrons.

Front

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

Back

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

Front

What is rusting an example of?

Back

A chemical change, as it involves the reaction of iron with oxygen to form iron oxide.

Front

What happens to water when it is heated to form steam?

Back

It undergoes a physical change from liquid to gas, but its chemical composition remains H2O.

Front

What is an example of a physical change?

Back

Melting ice into water.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash, smoke, and gases.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.