Eric Malever, Daniel Kelly and Jack Koras all notched a point in their Maryland debuts.
Benson was named interim offensive coordinator just weeks before the season started.
It's the first time the Terps have hit 20 goals in a conference game since 1983.
Fueled by a strong returning class and some experienced newcomers, the Terps are poised to compete at the top of the Big Ten.
Attackman Jared Bernhardt leads the way for the Terps, earning a second-team nod.
The Terps have lost each of their home games in Big Ten play.
Dickinson scored just three points Monday night.
The Terps' bench was outscored 33-16 against the Hawkeyes.
Eric Ayala scored a career-high 23 points to lead the Terps.
Morsell has shot less than 40 percent from the field in six games for the Terps.