An example of a grad-school level question?
A student leaves a rock in the Sun on a bright afternoon. An hour after sunset, the weather is cool, but the rock still feels warm. The student has demonstrated a property of the rock resulting directly from which of the rock's other properties?

An example of a grad-school level question?
Which human activity most often has a harmful effect on the environment?

An example of a grad-school level question?
A robin catches and eats a cricket. Which statement best describes the roles of each animal?

An example of a grad-school level question?
Mitosis occurs in living things when a cell divides to produce two cells. Compared to the original cell, how many chromosomes are in each of the resulting cells?