Post Assessment Law of Conservation of Matter

Front

What is the Law of Conservation of Matter?

Back

Matter is never created or destroyed in a chemical reaction.

Front

Why does the number of atoms remain the same in a chemical reaction?

Back

The number of atoms of each element are the same on both sides of the reaction.

Front

If Anika crushes an Oreo cookie that weighs 20 grams, how much do the crumbs weigh?

Back

20 grams.

Front

What happens to the mass of reactants in a chemical reaction?

Back

The mass of the reactants is equal to the mass of the products.

Front

If Jackson's chemical reaction product weighs 15 grams, what is the mass of the reactants?

Back

15 grams.

Front

What does it mean when we say matter is conserved?

Back

It means that the total mass remains constant before and after a chemical reaction.

Front

Can matter be created or destroyed during a physical change?

Back

No, matter is not created or destroyed during a physical change.

Front

Give an example of a chemical reaction that demonstrates the Law of Conservation of Matter.

Back

Burning wood: the mass of the ash and gases produced equals the mass of the wood before burning.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.