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the earths seasons and axis

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Alan Vayda

on 16 May 2011

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Transcript of the earths seasons and axis

The Earth's Seasons Autumn Winter Spring Summer Why do we have these seasons? The hemispheres of the earth are tilted away or close to the sun. Facts
the earth's tilt is about 23.5 degrees off of being perpendicular to the earth-sun plane
the equinoxes and solsitices are on the start of each season
the earth spins like a top that is wobbling ever so slightly
the earth's orbit is not a circle but is elliptical
during the solsictes the suns rays are directly on one of the tropics http://4.bp.blogspot.com/_Krl3c4dH05A/TJ2_YBQtghI/AAAAAAAAA_8/8jpQXHY5hXg/s1600/earth-tilt.gif A diagram of the seasons http://morris-photographics.com/ http://oceanworld.tamu.edu/resources/ocng_textbook/chapter04/Images/Fig4-1s.jpg Why do we have an axial tilt? 1) Some people think a big Mars size meteor hit Earth making the axial tilt and the flying derbis made the moon.
2) Some people think many years of meteors hitting the Earth made the axial tilt. I agree with number 1 because the many years might have had meteors everywhere on the surface of Earth, tilting it in many directions. Bibliography

Bell, Trudy. Earth's Journey Through Space. NY, NY: Chelsea House, 2008. Print.

Branley, Franklyn. Sunshine Makes the Seasons. NY, NY: Thomas Y. Crowell Junior Books, 1985. Print.

"Geography Seasons." How the Earth's Axis affects Seasons. Web. 10 May 2011. <http://geography.nuvvo.com/lesson/1505-how-the-earths-axis-affects-seasons>. Contents
1. the sesons
2. why do we have the sesons
3. diagram
4. why do we have an axial tilt
5. tilt of the Earth affecting the seasons
6. fun facts
7. bibliography
Full transcript