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Earth is 71 percent of water on the surface. The oceans hold about 96.5 percent of all of earths water. We need water to live. Water is also what everything needs to live plants, animals, trees, people, etc. but water is also in the air so that is why we have rain periodically. But we all neeed water to live it is one of the biggest reasons we are on earth living today.

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Earth has a titled axis of 23.5 degrees. It tilts and rotates on its axis, it takes 24 hours for the earth to rotate all the way around. The seasons are caused by the earths rotation. The reason earth rotates is because there would be no more seasons. Then there would be one side of earth that would be in darkness the whole time. That would be bad because the crops on the dark side would not grow because they would get no sunlight at all and the crops on the light side would always die because of all the heat and life would end because there would be no more plants or trees or any oxygen.

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The magnetic axis is very interesting. The South Pole of the magnetic axis is actually the North Pole on earth. The North Pole of the magnetic axis is geographically the South Pole. The magnetic axis acts as a post through the earth so the North Pole won't end up as the South Pole. Because the earth would be spinning around and would mess up the seasons.

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Earths magnetic field is created by its magnetic poles. It circles around the whole earth. The magnetic field protects us from harmful radiation like the suns rays. Its also why we see the northern lights up in the North Pole. The magnetic field is very big and has a great magnetic field.

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The atmosphere is what holds all around us. The atmosphere is where it rains and where all the weather happens. There are 5 different layers of the atmosphere the first is the troposphere, that is 0-12 kilometers high. Then the stratosphere which is 12-50 kilometers high. Then the third which is 50-80 kilometers high. Then the fourth is called the Thermosphere and that is 80-700 kilometers high. Lastly is the exosphere which is 700-10000 kilometers high. The first layer has all the rain and snow and other weather. The second layer protects us from harmful UV rays caused by the sun. The third layer protects us from most of the meteorites that come towards earth. The outer 2 layers don't do anything but the northern lights are in the thermosphere.

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atmosphere of earth (literature subject)

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Useful for CBSE, ICSE, NCERT & International Students Grade : 8 Subject :Chemistry Lesson : Air Topic: Different layers of the atmosphere The Earth's atmosphere can be divided into several layers. The layers are defined can vary depending upon what properties are taken into consideration.