What kind of process occurs naturally under certain conditions, unlike its opposite, which will not take place unless it is \u201cdriven\u201d by the continual input of energy from an external source?

The four Science Regents exams (Earth Science, Living Environment, Chemistry, and Physics) also include separately-scheduled lab practicals.
In New York, students have the opportunity to take Regents Exams in grades 9-12 and, when appropriate, in grade eight.