Reasons for the Seasons

By: Chloe Nelson


We have day and night because the earth spins on its axis. The side that is facing the sun is currently in the daylight, and the side that is facing away from the sun is currently in the dark. Every 12 hours the sides flip so both will have a period of time in the light and the dark within the full 24 hours of the day. Earth's rotation on its axis is the spinning the earth does on a invisible line that is located at the center of the earth, and through it. It takes a full 24 hours for the earth to rotate once. The earths revolution is its journey around the sun. It takes 365 1/4 days for the earth to make its full revolution, that signals the new year.
We have seasons on earth because of two reasons. The way that the earth is tilted is one reason. Depending on how the earth is tilted, the way the sun hits it is different way, causing the season to change. The orbit is another reason. The position of the earth can change how the sun is compared to it. Also due to the orbits elliptical shape, there are times the earth is closer to the sun than what it usually is.The seasons in the northern hemisphere can more than the ones in the southern hemisphere because it is closer to the sun. The area at the equator does not experience months.The lengths of the days during the summer is longer than the other seasons, while the winter days are shorter than the other seasons. The summer solstice is the day of the year were the sun is out the longest, and the winter solstice is the day were the sun is out the shortest amount of time. The summer solstice occurs on either june 21 or 22, and the winter solstice occurs of either December 21 or 22. The spring and fall equinoxes are the days of the year were night and day both have exactly 12 hours in that day. The spring equinox occurs on April 21 and the fall equinox occurs on September 21. During the summer, the north and south poles can experience something called a "midnight sun". There is basically no night and day during this time. The length of day and night at the equator is longer than 12 hours. That means that is has longer days than the rest of the world. If the earth was not tilted on its axis, then we will have no seasons. We will have day and night, and the side facing the sun will always be warmer, but we will never have true seasons.
If the earth was tilted at a greater degree, then the seasons will be more extreme. Depending on how it ends up being tilted, the summer months will end up being hotter, and the winter months a lot colder, or vice-versa. The natural temperature change that happen with each new season is a natural event that causes the seasons to change. It also signals the start of a new one. If we were closer to the sun, i feel like we would lose winter. Even if the earth is tilting, its way to close to our heat source, meaning the months that would normally be winter won't be cold anymore. The length of our shadow are different in summer and winter. In the winter your shadow becomes a lot shorter because their isn't as much sun out. In the summer our shadow is the longest because the is brighter, for a longer period of time. Organisms are able to notice the change in the seasons because they can feel the temperature change. If they are hibernating, they can clearly feel whenever spring comes because the temperature rises at the atmosphere becomes different. If earth had a faster revolution, it means that the seasons would change faster, and our year would be shorter.
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