Chemical Changes

Front

What is a chemical change?

Back

A chemical change is a process where new substances are formed, involving a rearrangement of atoms.

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

What is precipitation in chemistry?

Back

Precipitation is the process where a solid forms from a solution during a chemical reaction.

Front

What happens to the mass of matter during a physical change?

Back

The mass of matter stays the same during a physical change, according to the law of conservation of matter.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

Front

Give an example of a physical change.

Back

An example of a physical change is making a paper airplane.

Front

What is the law of conservation of matter?

Back

The law of conservation of matter states that matter cannot be created or destroyed in a chemical reaction.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.

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.

Front

What is sublimation?

Back

Sublimation is the process where a solid changes directly into a gas without becoming a liquid first.