An example of a grad-school level question?
Which natural material is best for making a table?

An example of a grad-school level question?
Jake's cats eat food from a can. The cats come running into the kitchen when they hear the electric can opener. Now, each time Jake's mother opens a can of corn, the cats come running. This is an example of

An example of a grad-school level question?
Cells in the body use oxygen (O2) for cellular respiration. Which is the result of cellular respiration?

An example of a grad-school level question?
One hundred grams of water and 100 grams of vegetable oil are heated in identical containers at 70C for 5 minutes. Their temperatures at the end of 5 minutes are different due to the difference in which property?