At this point, it is Earth’s South Pole that is tilted toward the Sun, and so there are shorter days and longer nights for those who are north of the equator. Since the southern half of the Earth is pointed away from the Sun at that point, they have the opposite effect-longer nights and shorter days.įor people in the Northern hemisphere, winter begins on December 21. Therefore, areas north of the equator experience longer days and shorter nights because the northern half of the Earth is pointed toward the Sun. At this point, the Earth’s North Pole is pointed directly toward the Sun. For example, in the Northern hemisphere, we begin summer on June 21. As you move towards the poles, summer and winter days have different amounts of daylight hours in a day. As the Earth rotates, different places on Earth experience sunset and sunrise at a different time. ![]() Since the Earth completes one rotation in about 24 hours, this is the time it takes to complete one day-night cycle. As Earth rotates, the side of Earth facing the Sun experiences daylight, and the opposite side (facing away from the Sun) experiences darkness or nighttime. Earth’s Day and NightĪnother effect of Earth’s rotation is that we have a cycle of daylight and darkness approximately every 24 hours. As Earth turns, the Moon and stars change position in our sky. Earth’s rotation is also responsible for this. When we look at the Moon or the stars at night, they also seem to rise in the east and set in the west. ![]() We often say that the Sun is “rising” or “setting”, but actually it is the Earth’s rotation that gives us the perception of the Sun rising up or setting over the horizon. As the Earth rotates, observers on Earth see the Sun moving across the sky from east to west with the beginning of each new day. If you were to look at Earth from the North Pole, it would be spinning counterclockwise. The Earth rotates once on its axis about every 24 hours. ![]() Explain how movements of the Earth and Moon affect Earth’s tides.Įarlier we discussed Earth’s rotation and revolution.Describe the phases of the Moon and explain why they occur.Describe how Earth’s movements affect seasons and cause day and night.In this lesson you will learn about how the movements of the Earth, Moon, and Sun affect different phenomena on Earth, including day and night, the seasons, tides, and phases of the Moon.
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