An example of a grad-school level question?
Atmospheric greenhouse gases help heat the atmosphere by

An example of a grad-school level question?
The Piedmont and Coastal Plains regions in Maryland produce crops such as corn, soybeans, wheat, tobacco, tomatoes, and apples. Which environmental factor most likely influences which crops are grown in these regions?

An example of a grad-school level question?
Which unit of measurement describes an object's length?

An example of a grad-school level question?
A windstorm knocks down many trees in a national park. Timber companies want to get rid of the fallen trees. How would this most likely harm the park ecosystem?