Earth+Revolves+Around+Sun?

Earths Rotation Around the Sun Brontë Shamata and Robin Perry

We are doing a science project researching the Earths rotation around the sun. We will be looking into the historical ideas surrounding this topic, the reason for night and day, seasons, and daylight savings time.

EVERY YEAR THE EARTH ROTATES AROUND THE SUN -It takes 364 days for this rotation to take place. -While the Earth is rotating around the Sun, it is spinning much faster on it's own axis. It rotates once around this axis every day. -The Earth rotates counterclockwise, that's why we see the Sun rise in the East and set in the West.

SEASONS - Seasons happen because the Earths axis is tilted as it orbits around the Sun. - Because the Earth is on a tilt, at a point in it's rotation around the Sun, the North will be tipped towards the Sun, while the South will be tipped away. Six months earlier or later, the opposite will occur. -Example: When it is Canada's summer, it is Australia's winter.

SEASONS:

= DAYLIGHT'S SAVING TIME = - Daylight saving's time is caused because of the way the earth rotates around the sun, at different times of the year. - Sometimes a place on the earth will get more sun (during summer time) and then the oposite side of the earth gets less (during winter time) - As the earth continues to rotate, the postition of the earth and the sun, will constantly be changing and eventually the part of the earth that has more sun, (summer) will then experience less sun (winter) during the same year. - In result of this we advance our clocks so that in the afternoon there is more sun, and in the mornings there is less. - At the start of spring, our clocks are turned ahead one hour, and are turned back in autumn/fall.


 * HISTORICAL IDEAS SURROUNDING THE EARTH'S ROTATION **

- Around 300 B.C. the idea that the Sun revolved around the Earth was a common belief. - It was not until around 320 B.C. that the idea of the Earth revolving around the Sun was introduced by Aristarchus of Samos. - Aristarchus of Samos was an early Greek Astronomer who believed that the Sun was like a watermelon, and the Earth like peach, and found it strange that the bigger body was said to be the one in rotation, while the smaller body was the point of orbit. - Below is a diagram, illustrating Aristarchus's idea. - In this diagram, S is the Sun, and E is Earth. - Some of the myths around the Earths rotation are: - The Sun and Earths moon both revolved around the Earth. - The Earth was flat and the sun simply moved from the top to the bottom.


 * CITATIONS:

http://www.msnucleus.org/membership/html/k-6/uc/earth/1/uce1_3a.html

[|http://www.mlahanas.de/Greeks/Astronomy.html] 

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