Law of Conservation of Mass, Science Weekly 5th grade

Front

What is the Law of Conservation of Mass?

Back

States that mass is neither created nor destroyed in chemical reactions.

Front

What happens to the weight of a substance when it changes state (e.g., solid to liquid to gas)?

Back

The weight remains the same.

Front

What is a mixture?

Back

A combination of substances.

Front

How can you prove that a substance is dissolved in a mixture?

Back

Weigh the mixture.

Front

Where does sugar go when it is mixed with water?

Back

It goes into the water.

Front

What happens to the mass of iron when it is melted and then turned into gas?

Back

The mass remains the same.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of substances that can be separated, while a compound is a substance formed when two or more elements are chemically bonded.

Front

What is an example of a substance that cannot be seen when dissolved?

Back

Salt in water.