An example of a grad-school level question?
For many years, people have been curious about the stars. In the past, people have shared what they knew about the stars through stories and drawings. Which pair of tools would be most helpful for people today to gather and share information about stars?

An example of a grad-school level question?
An organ pipe produces a musical note same number of nitrogen gas molecules. with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s?

An example of a grad-school level question?
Where is most of Earth's water located?

An example of a grad-school level question?
In which structure is the Sun located?