An example of a grad-school level question?
In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would best represent

An example of a grad-school level question?
An agricultural scientist, George Washington Carver, is most famous for his research on

An example of a grad-school level question?
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon [C], how many atoms of carbon [C] should be in the products?

An example of a grad-school level question?
Which form of energy are x rays and ultraviolet light?