Degrees longitude. The intervals divided this way are the time zones.
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Degrees of Longitude or Meridians.
Geologists have divided Earth's history into a series of time intervals. These time intervals are not equal in length like the hours in a day. Instead the time intervals are variable in length. This is because geologic time is divided using significant events in the history of the Earth.
It takes exactly 24 hours
Observations that repeat at regular intervals of nearly 24 hours ... nearly the same time every day or night ... are the result of earth's axial rotation. Observations that repeat at regular intervals of roughly one year are the result of earth's orbital revolution.
The intervals for 4 times daily would be every 6 hours. There are 24 hours in a day divide that by 4 and you get 6. 6x4 = 24
it takes a year to circle the sun and 24 hours to make a full 360 degree rotation.
four hours
20 minutes. The Earth rotates 360 degrees every 24 hours. So it rotates 15 degrees every hour, so 5 degrees is 1/3 hours or 20 minutes.
There are 360 meridians which represent 360 degrees of a full rotation of the earth - relative to the sun. Since the period of the earth's rotation takes 24 hours, each meridian represents 24/360 hours = 24*60/360 minutes = 4 minutes.
6
The moon rises about 50 minutes later each day because it orbits around the Earth in the same direction the Earth rotates. This means it has to "catch up" to align with a specific point on the Earth for us to observe it rising.