An example of a grad-school level question?
Which behavior is a learned behavior?

An example of a grad-school level question?
Garrett collected some large rocks from a stream near his home. He measured the rocks on a balance. When he records the mass of the rocks, which units should Garrett use?

An example of a grad-school level question?
Which of the following is an example of matter changing state?

An example of a grad-school level question?
A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are produced, and the solution becomes very hot. Which of these best describes what happens to form the bubbles when the cleaner is added to water? F