Astronomy- Nebulas and Auroras
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1. The Earth's magnetic field is generated by the liquid outer core of the earth. As the earth spins, the core acts as a big magnet situated inside the earth.
Aurora's result from solar electrons and protons striking molecules high in the Earth's atmosphere, and then being held there by the Earth's Magnetism. They occur mainly at the Earth's poles.
The earth got its atmosphere and oceans from the volcanic activity on earth. The volcanic activity released Carbon Dioxide and Water Vapor. The water vapor rained down to form the oceans, and the carbon dioxide got absorbed by the oceans and land, and life. Oxygen came from the water, and the forming of life on earth.
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