Why are there areas on earth that are light and dark? The existence of light and dark areas on earth is caused by the rotation of the earth . Rotational motion is the rotational movement of the earth about its axis. The earth’s axis is an imaginary line that connects the north pole and the south pole of the earth. The Earth’s rotation time is 23 hours, 56 minutes and 4 seconds .
When the earth rotates, there is a part of the earth facing the sun and a part facing away from the sun. The part of the earth facing the sun will be bright and experience daylight. Meanwhile, the part of the earth that faces away from the sun will be dark and experience nighttime.
The change of day and night on earth occurs alternately. This happens because the earth rotates continuously without stopping.
The following is a more detailed explanation of why there are areas on earth that are light and dark:
- The sun is a source of light and heat for the earth.
- The earth rotates on its axis.
- The earth’s axis is tilted 23.5 degrees to the plane of its orbit around the sun.
When the earth rotates, there is a part of the earth facing the sun and a part facing away from the sun. The part of the earth facing the sun will be bright because it is exposed to sunlight. Meanwhile, the part of the earth that faces away from the sun will be dark because it is not exposed to sunlight.
The change of day and night on earth occurs alternately. This happens because the earth rotates continuously without stopping.
During the day, the part of the earth facing the sun will experience daylight. At this time, the sun will rise in the east and set in the west. At night, the part of the earth that is facing away from the sun will experience night. At this time, the sun will set in the west and rise in the east.
The length of day and night on earth varies depending on the latitude of the earth. In equatorial regions, the length of day and night is almost the same throughout the year. Meanwhile, in polar regions, the length of day and night is very different throughout the year. In summer at the north pole, daylight hours last 24 hours. Meanwhile, in winter, the night will last for 24 hours.
