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earth science related things
im doing a study sheet for my earth science final exam.. and all the websites i looked at for these questions use big terms that i dont know and things like that lol(and we dont have our books anymore. the questions that i need to know are what causes moon phases, what causes earth quakes, and earth quake energy waves. kind of in stupid person terms lol.
thanks!
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Moon phases are caused by the revolution of the moon around the earth. While the earth revolves around the sun, the moon is revolving around the earth. This causes you to see different amounts of the moon at different times.
Earth quakes are caused by the movement of tectonic plates. Earth's lithosphere is made up of different plates, which converge (move together) and diverge (move apart). The shifting of the plates cause earthquakes.
Earthquakes let off two different kinds of energy waves-- P-waves and S-waves. P-waves are always faster than S-waves. Also, P-waves can travel through solids, liquids, and gasses, while S-waves can only travel through solids. Do you have the Earth Science Reference Tables? It should show you a chart in the differeneces between arrival times of P and S-waves.
Good luck on your final exam ;]
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