Based on what you know about changes in matter, explain why the diagram shows a physical change rather than a
chemical change.
a. the particles get smaller.
b. the volume of the matter decreases.
c. the composition of the matter stays the same.
d. the particles change into particles of different substances.

The human body maintains a temperature of around 98.6 degrees at all times. enzymes are involved in almost every chemical reaction in the body. which of the following describes the connection between these two statements? a. enzymes function best at a specific temperature. b. the body needs to be warm to prevent hypothermia. c. the body is kept relatively warm to prevent too much enzyme action. d. there is no connection between the two statements.