The Terps were held scoreless for the third time this season.
The Terps kept their third consecutive clean sheet at home, but had to settle for a point after failing to capitalize on their chances.
The Terps, who host Purdue Thursday, are 2-0-1 at Ludwig Field this season.
Micah Seger's giveaway helped the Nittany Lions score the game-winner.
The Terps struggled generating offense in their first Big Ten match of the season.
Nitzl battled through an injury and missed the Terps' first few games, but continued to lead from the sideline.
Goalkeeper Liz Beardsley made nine saves, but the Terps lost comfortably in their first Big Ten test of the season.
The Terps have won three straight games ahead of Friday's test against No. 6 Penn State.
The Terps started their defense of the regular season Big Ten championship with one point instead of three.
Terps coach Meghan Ryan Nemzer often calls on Morales to fill in as an offensive and defensive presence in Maryland’s midfield. Nemzer has repeatedly called Morales her “utility player."