Popular in Astronomy 101
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Popular in Astronomy
This 2 page Study Guide was uploaded by Abigail Hills on Friday February 19, 2016. The Study Guide belongs to Astro 101 at University of New Mexico taught by Dr. Matthews in Spring 2016. Since its upload, it has received 39 views. For similar materials see Astronomy 101 in Astronomy at University of New Mexico.
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Date Created: 02/19/16
Astronomy 101 Weekly notes 2/19/2016 I. New Words/ Concepts: (Earth/Moon) 1. Seismic Waves: Pwaves (pressure or primary waves) : travel through fluids and solids SWaves (shear or secondary waves): ONLY travel through solids 2. Continental Drift: Tectonic plates, plate boundaries, converge/diverge from upper mantle 3. Magnetosphere: Van Allen Belts, solar wind influence, II. Lecture Notes: Earth/Tides/ Plate Tectontics If the earth had no moons, we would have tides, we would have tides, but they would be less intense. The ozone layer sits at the top of the stratosphere, and shields the earth from harmful UV Rays Interiors of planets/moons: o How are they discovered? Answer: Studying Seismic waves o Seismic waves are the waves that occur from earthquakes o Because they change speed at different layers, we can tell the location of different layers PWaves: Propegates solid and liquids Travels like a SLINKY Swaves S waves cannot propegate through liquids Travels like a STRING being moved up and down The Mantle is less dense than the earth’s Core Convection drives the movement of plate tectonics Moon Lunar Maria: Large dark spots on the moon people thought these used to be oceans Deep Craters Lunar highlands: high points on the moon Regolith: dust that covers the surface of the moon dust is left over from past meteorite impacts How did the moon form? o Collision theory: Meteorite collided with the earth>extra material maintained orbit w the moon Magnetosphere Charged particles from solar wind are trapped know what van allen belts are Aurora Borealis: solar wind particles interacting with the atmosphere Other Planets: Venus orbits in retrograde motion (thumb down) All other planets in solar system are in prograde (Thumb up)
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