7th Grade Benchmark Review

Front

What is the chemical formula for table salt?

Back

NaCl

Front

How many atoms of chlorine are in 4 NaCl?

Back

4

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.

Front

Is the equation 4P + 5O2 -> 2P2O5 balanced or unbalanced?

Back

Balanced

Front

What is a sign that a chemical reaction has occurred?

Back

A change in color, temperature, or the formation of a gas or precipitate.

Front

What happens to the rate of a chemical reaction when temperature increases?

Back

The rate of the reaction increases.

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

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

Back

A catalyst speeds up a chemical reaction without being consumed.