What is the mood in Act One of The Crucible and what details contribute to this mood?

The mood in the first act of The Crucible
is one of fear and suspicion more than anything else.  We're introduced to a
world in which sin is condemned and often punishable by death, and in which pointing out
the sins of others is totally acceptable and even encouraged.  The girls are trying to
escape punishment, so there is fear; some believe there is an outbreak (or infestation)
of witchcraft in town, so there is fear; Tituba fears she will end up taking all the
blame for this incident--again; and one (Reverend Parris) is afraid his enemies--also
known as his parishioners--will blame him for this problem.  More
fear.

Suspicion is found in Goody Putnam who believes some
women in the town are killing her unborn babies; in Thomas Putnam who thinks everyone is
trying to take advantage of him; Reverend Parris suspects John Proctor is leading a
"faction" against him; Reverend Hale suspects Satan may have a hold on
Salem.

The result of this fear and suspicion is accusation,
which ultimately leads to the deaths of nearly thirty innocent
people.