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The full Moon of September 27/28 is a Supermoon – the Moon will be closest to the Earth.

The digital root of a number is the number obtained by adding all the digits of that number. If that sum is a two digit number, then add the digits of that number, and continue until a single-digit number is reached.

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Average or arithmetic mean is the central tendency of a set of data. An average is the sum of a list of numbers divided by the number of numbers in the list.

After studying the speed of light and sound last week, we built on that knowledge by looking at the speed of 30 different objects, natural phenomenon, animals, people, and even a cliche. We even debunked a few myths such as the speed of the human sneeze is 100 miles per hour; it is only about 25 MPH. We also looked at the running speed of the average human. See the pdf called Speed of Everything in MPH with Explanations.

Twice this summer, I experienced severe lightning storms on the water. Understanding this natural phenomenon can make this experience fascinating and safe instead of scary. Since the sound travels at 1,088 feet per second, it takes five seconds for bang of thunder to travel one mile. So counting from the flash to the bang and dividing by five will tell you the number of miles that lightning is from your location.