Front

What is density?

Back

Density is a characteristic property of a substance that stays the same regardless of the volume.

Front

What is the purpose of a catalyst in a chemical reaction?

Back

The main purpose of a catalyst is to speed up the reaction.

Front

What type of change is slicing bread?

Back

Slicing bread is a physical change.

Front

What is a precipitate?

Back

A precipitate is a solid that forms when two liquids react and a solid is produced.

Front

How is a chemical change different from a physical change?

Back

In a chemical change, a new substance is formed, while in a physical change, no new substance is formed.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical composition remains the same.

Front

Can a chemical change be reversed?

Back

Most chemical changes are not easily reversible, unlike physical changes.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it produces ash and smoke.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical structure.

Front

What is the role of reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products.