Blog post 7

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For today's lesson one objective, we had to define multiple terms that can help us to understand time zones and general time around the world. Time zones are the region of the globe that observes a uniform standard time for legal, commercial, and social purposes. UTC is universal coordinated time and it is  a time standard, basically, for every 15 degrees west the time is an hour up, but for every fifteen degrees west it is an hour down. This is an easy way to be able to calculate time zones so everyone is able to know what the time is in different places. GMT is greenwich mean time and it is located at the prime meridian (0 degrees). GMT is the master reference time for all points on Earth. Countries also use things such as daylight savings times for part of the year as an adjustment to their time zone. Daylight savings time Is when clocks are pushed forward an hour in order to provide an extra hour of daylight during warm months. In order for time zones to be calculated, standard deviation of time is used. Standard deviation of time is a time calculated in order for different countries and places to be able to change the time zone to their preference.

In order for standard deviation to be used, it has to be calculated first by geographers. This is done by working out the mean of the time in an area and the UTC, then by subtracting the mean by this, squaring this answer, finding the mean of the squared number and then finally squaring it again. Standard deviation is very helpful in order for people to know the time in every place even if they don't follow a standard time zone. Without this process, it would either be very strict in each country for time zones so they could be understood, or there would be no way to find out the time in a place that doesn't use a worldwide time.

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