why do we have different time zones
If we had one single time zone for Earth, noon would be the middle of the day in some places, but it would be morning, evening and the middle of the night in others.Since different parts of the Earth enter and exit daylight at different times, we need different time zones.f we had one single time zone for Earth, noon would be the middle of the day in some places, but it would be morning, evening and the middle of the night in others.
In order to build the time zone map, they studied Earthâs movements. As the Earth rotates on its axis, it moves about 15 degrees every 60 minutes. After 24 hours, it has completed a full circle rotation of 360 degrees. The scientists used this information to divide the planet into 24 sections or time zones.Each time zone is 15 degrees of longitude wide.f we had one single time zone for Earth, noon would be the middle of the day in some places, but it would be morning, evening and the middle of the night in others.