After a sluggish first half, No. 3 Ohio State pulled away for a dominant 35-7 win against Iowa. Here's what we learned.

Iowa (3-2, 1-1) held the Buckeyes to only one score in the first half, an 88-yard touchdown drive on their first possession. But Ohio State's stout defense shut down Hawkeyes star running back Kaleb Johnson and limited Iowa to only 90 yards in the first half. That allowed the Buckeyes to go into the locker room with an uncomfortably slim lead.