Unit 2 Changes in Matter

Front

What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, gas production, or precipitate formation.

Front

What is a Physical Change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state, shape, or size.

Front

What is the difference between a Chemical Reaction and a Physical Change?

Back

A chemical reaction results in the formation of new substances, while a physical change does not change the substance's chemical identity.

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction; it only changes form.

Front

How do you identify a Chemical Reaction?

Back

Look for signs such as color change, gas production, temperature change, or the formation of a precipitate.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

Front

What is the formula for glucose?

Back

C6H12O6.

Front

How many atoms of carbon are in a glucose molecule?

Back

6.

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.