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What causes the seasons? Earth science

By |2018-04-24T15:45:14-07:00August 20th, 2017|Physics|

This is why it's hotter in summer and colder in winter. The reason it is sometimes winter and sometimes summer is that the Earth spins on a slightly tilted axis. You can see the red axis in the picture here (though really there is no axis to see; it's a direction, not a real stick). [...]

Why does earth have weather? – Earth Science

By |2017-08-20T17:40:27-07:00August 20th, 2017|Physics|

A thunderstorm in South Africa The weather on Earth happens because of the evaporation and condensation of water, and because of the spinning of the earth and the tilt of the earth on its axis. Does it seem strange that such quiet things could cause big thunderstorms and huge waves and blizzards? Here's why. Because the Earth is tilted on its axis, [...]

What’s the equator? Geography and the Earth

By |2019-05-30T17:06:09-07:00August 20th, 2017|Physics|

This globe shows the equator running around the widest part of the Earth. Where is the equator? The equator is an imaginary line running around the widest part of the Earth, halfway between the North Pole and the South Pole. You can't see it. Why does Earth have weather? Plate tectonics and continents What [...]