A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed, preferably using a written, pre-defined, protocol of observations and experiments.
Process Engineer Salary. A Process Engineer earns an average salary of $70,876 per year. A skill in Simulation is associated with high pay for this job. Most people move on to other jobs if they have more than 20 years' experience in this field. $52,970 - $97,247.
Starting High or Getting Better. The average starting salaries of engineering bachelor's grads vary depending upon the particular discipline. According to the NACE January 2014 Executive Summary of 2013 grads, petroleum engineers received the highest starting pay of all majors, receiving an average of $97,000 annually.