An example of a grad-school level question?
Since 1961, Nevada has led the United States in production of which resource?

An example of a grad-school level question?
Which of the following is an example of matter changing state?

An example of a grad-school level question?
Rocks in warm and humid environments can be weathered faster than rocks in other environments. Which is most likely the next step in the rock cycle for weathered rocks?

An example of a grad-school level question?
Repeated exposure to extremely loud sounds can reduce hearing ability by direct damage to which structures?