One difference is the amount of daylight that a particular place on the globe is going to experience. You may have noticed that "equinox" is similar to the word "equal." That is a good connection to make because an equinox represents a day (March 20 or 21 and September 22 or 23) when the duration of day and night are equal. A solstice, on the other hand, represents a time when the day is longest (June 21) or a time when the day is shortest (December 21). This does not mean the 24 hour day/night cycle has changed. It just means that the number of daylight hours is at the maximum or minimum. This is because Earth's rotational axis is tilted, and Earth revolves around the sun. At the summer solstice, Earth's geographic north pole is tilted toward the sun. Therefore, there are more sunlight hours than dark hours. The winter solstice sees the north pole pointing away from the sun, so daylight hours are shorter. The spring and fall equinoxes are times when the northern and southern hemispheres receive equal amounts of sunlight. The sun is directly "above" the equator. The equinoxes coincide with spring and fall, and the solstices coincide with winter and summer. Finally, the days shorten or lengthen following the equinoxes, but the solstices are the shortest or longest days: after them, the daylight length will reverse. The days get shorter as we approach the fall equinox and the winter solstice, and the days get longer as we approach the spring equinox and summer solstice. Then, the entire process will reverse.
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Saturday, October 31, 2015
Explain five differences between a solstice and an equinox.
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