When do many grains of sand become a pile of sand?

Sarah and juan were running in the school track meet. the muscles in their arms and legs them run fast. other muscles that you cannot see were also at work. the most important muscles for this track meet were the muscles in their a) arms. b) eye. c) feet. d) heart.

In the centauromachy metope of the parthenon, human is to centaur as is to .

Choose the term below that you would not find as a musical part of the medieval mass.