Conservation of matter

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; it only changes forms.

Front

If 25 grams of sugar dissolves in 150 grams of water, what is the total weight of the solution?

Back

175 grams.

Front

What happens to the total weight of a sealed air bag before and after it inflates?

Back

The weight stays the same.

Front

Where does the matter go when a fire snake burns and weighs slightly less afterward?

Back

The matter escapes as gas.

Front

If two students use 400 grams of clay to make different shapes, what can be said about the mass of their creations?

Back

The figures would have equal masses.

Front

What does it mean when we say matter 'stays the same' during a chemical change?

Back

It means that the total mass of the matter before and after the change is equal.

Front

Can matter be created or destroyed in a chemical reaction?

Back

No, according to the Law of Conservation of Matter, matter cannot be created or destroyed.

Front

What is an example of matter changing form but not disappearing?

Back

When ice melts into water, it changes form but the total mass remains the same.

Front

If a balloon is filled with air, what happens to the weight of the balloon?

Back

The weight of the balloon increases because air is matter.

Front

What happens to the mass of a candle after it burns?

Back

The mass decreases because some of the matter escapes as gas.