What turbulence conditions should a pilot expect when flying at 10,000 feet through northern Iowa and northern Nebraska?

When flying at 10,000 feet over northern Iowa and northern Nebraska, pilots can expect moderate or greater turbulence due to several factors commonly associated with this region. At this altitude, the aircraft may encounter turbulence induced by weather systems such as cold fronts or thunderstorms that are often prevalent in these areas, especially during certain seasons. The boundary layer effects from land and changes in terrain can also contribute to more instability and turbulence.

In addition, as planes navigate over the central United States, they may experience the turbulence caused by wind shear, which can occur at this altitude due to the interaction between high and low-pressure systems and varying atmospheric layers. These elements combined can lead to stronger turbulence conditions than just light or slight turbulence, making moderate or greater turbulence a reasonable expectation.

Considering the specific choices, other options would not account for these significant turbulence influences at 10,000 feet, making the selection of moderate or greater turbulence the most accurate answer.