How are air pressure and temperature related during this time period?
a. directly, when one goes up, the other goes up.
b. indirectly, when one rises, the other is unaffected.
c. conversely, when one goes up, it makes the other go up.
d. inversely, when one goes up, the other goes down.

B

Explanation:

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.