An example of a grad-school level question?
A student uses a telescope to view stars at night. The student notices some of the stars are different colors. The color of a star is determined most by its

An example of a grad-school level question?
When a person chews, saliva from the mouth mixes with starches in food. These starches begin to turn into sugars. Changing starches into sugars is best described as

An example of a grad-school level question?
When liquid water freezes, it forms ice. What is the physical state of an ice cube?

An example of a grad-school level question?
Which action is the best method to separate a mixture of salt and water?