Chemical and Physical Changes

Front

a process in which one or more substances, the reactants, are converted to one or more different substances, the products

Back

chemical reaction

Front

the minimum amount of energy required for a chemical reaction to occur

Back

activation energy

Front

a naturally occurring chemical substance that combines with other amino acids to make protein

Back

amino acid

Front

a chemical reaction in which substances combine rapidly with oxygen to produce light and heat

Back

combustion

Front

a substance that reacts with another during a chemical reaction

Back

reactant

Front

A ______________ results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.

Back

chemical change

Front

a ___________ the appearance or form of the matter changes but the kind of matter in the substance does not

Back

physical change

Front

Which type of change occurred in the picture?
Options: chemical change, physical change

Back

chemical change

Front

Which type of change occurred in the picture?
Options: chemical change, physical change

Back

chemical change

Front

Which type of change occurred in the picture?

Back

physical change