The work of scientists usually begins with
a. testing a hypothesis.
b. careful observations.
c. creating experiments.
d. drawing conclusions.

A. Testing a hypothesis

This leads to the other points

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)