Chemical and Physical changes

Front

What does the Law of Conservation of Mass state?

Back

Matter can't be created or destroyed.

Front

What type of change occurs when wood is burned in a fireplace?

Back

Chemical Change.

Front

What type of change occurs when ice melts?

Back

Physical Change.

Front

What is the process called when gas cools and turns back into a liquid?

Back

Condensation.

Front

Why does a block of wood float while a small nail sinks in water?

Back

The nail is more dense than the wood.

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 a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

Give an example of a physical change.

Back

Melting ice, boiling water.

Front

Give an example of a chemical change.

Back

Rusting of iron, burning wood.

Front

What happens to the mass of substances during a chemical change?

Back

The mass remains the same; it is conserved.