An example of a grad-school level question?
A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?

An example of a grad-school level question?
Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?

An example of a grad-school level question?
Which rapid changes can be caused by storms?

An example of a grad-school level question?
If an environment becomes warmer and drier, the change that would most likely help a species adapt would be an increase in its