7 - Lesson 12 Chemical Reaction Vocab

Front

What is a substance that exists before a chemical reaction takes place?

Back

Reactant

Front

What is the scientific law stating that matter cannot be created or destroyed?

Back

Law of Conservation of Matter

Front

What is a process in which one or more new substances form from one or more other substances?

Back

Chemical reaction

Front

What type of test do medical scientists perform to assess a medicine's effectiveness?

Back

Clinical trial

Front

What is a chemical reaction that releases more energy to the surroundings than it absorbs?

Back

Exothermic reaction

Front

What do we call a substance formed as a result of a chemical reaction?

Back

Product

Front

What is the term for a reaction that absorbs energy from its surroundings?

Back

Endothermic reaction

Front

What is the term for the starting materials in a chemical reaction?

Back

Reactants

Front

What is the principle that explains why mass is conserved in a chemical reaction?

Back

Law of Conservation of Mass

Front

What is the term for a change that occurs when substances combine to form new substances?

Back

Chemical change