tiistai 9. lokakuuta 2012

Earth´s rotation and revolution

GE1: Use following links to study the Earth´s revolution around the Sun, changing of seasons and the changes in the zenith position

Prezi about the rotation and revolution of the Earth

Animation of the revolution here and there

Animation about the tide
and another one

In the picture below a low tide in Gili Trawangan island, Indonesia
















Then a photo during a high tide















What does it mean when it is said that the Earth is in perihelion in July and in aphelion in January? Answer or suggest in the comments!

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