7 - Lesson 12 Chemical Reaction Vocab

Front

What is an exothermic reaction?

Back

A chemical reaction that releases more energy to the surroundings than it absorbs.

Front

What is a clinical trial?

Back

A type of test that medical scientists perform to assess a medicine's effectiveness.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs more energy from the surroundings than it releases.

Front

What is a chemical equation?

Back

A shorthand notation made up of arrows and chemical formulas for reactants and products that summarizes what happens during a chemical reaction.

Front

What is a reactant?

Back

A substance that exists before a chemical reaction takes place and changes as a result of the 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 law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed in the process.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.