You are a molecule of nitrogen. Choose a starting point in the nitrogen cycle and describe the
process you would go through to move through the
entire cycle.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

Which of the following is a testable hypotheses?