"We have the best chemistry probably across the Big Ten."
The Nittany Lions recorded multiple hat tricks in its upset over the Terrapins.
Kristin O'Neill surpassed her single-season goal record as she led Penn State to a tight victory.
Northwestern's Izzy Scane scored six goals to reach her 60th of the season.
Despite a comeback effort, the Terrapins' five-goal lead in the second period proved to be too much to overcome.
The men's team sits at No. 10, while the women's team jumped to No. 20.