Morphemes are best defined as what ?

You think all professors are uncoordinated, but then you see your social psychology professor make a diving catch down the left-field line at an intramural softball game against the arts department team. you also notice that your professor hits lead-off for the team and is able to score from second base on a ground-out. you maintain your original stereotype of professors as uncoordinated by deciding that this one individual is an exception to the rule because he is a “young professor.” this is an example of

At 3476 kilometer the moon's diameter is slightly less than the distance across from what

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?