Select the word that means exposed as false. Do you believe that toilet bowls flush counterclockwise in the northern hemisphere and clockwise in the southern hemisphere? You may have heard that the Coriolis effect, caused by the rotation of the earth, makes toilets flush in different directions in toilet bowls above and below the equator. Scientists have debunked this myth, though, explaining that the Coriolis effect controls the direction of water flow only in much larger bodies of water, hundreds of miles in diameter.The direction of your toilet's flush simply depends on how the manufacturer designed it.