An example of a grad-school level question?
Which gas, when condensed into its liquid state in the atmosphere, forms clouds?

An example of a grad-school level question?
Crows are found throughout many parts of the world. They are black birds with excellent hearing. In the wild they live for six to seven years. Some crows in Japan open hard-shelled nuts by dropping them in front of moving cars. Which of these is a learned behavior?

An example of a grad-school level question?
A family installs a new heating system in their home. Which is the most desirable result of the new heating system?

An example of a grad-school level question?
Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate?