Calculating the Distance from Lightning

I taught a lesson this week about four types of severe storms.  After teaching this lesson, I stumbled across these resources about how to calculate the distance from a lightning strike.

Since sounds and light travel at different speeds, you count the number of seconds between the point where you first see a lightning strike and the point where you hear the thunder.  An explanation of how to calculate this in miles can be found here:  http://www.weatherwizkids.com/weather-thunderstorms.htm

However, there is a slightly different method for calculating this distance in kilometers.  Watch the video below to see how to do this in kilometers.

This made me think about the following quotes:

     

To be successful in science and in life, one must appreciate the differences and similarities in all things, whether you are talking about people, plants, animals, or severe storms.