ASTR 151 1st Edition Lecture 14 Outline of Last LectureI. Chapter 7 Section 1 Structure of Earth ContinuedII. Chapter 7 Section 3 Earth`s InteriorIII. Chapter 7 Section 4 Surface ActivityOutline of Current LectureIV. Chapter 7 Section 4 Surface Activity ContinuedV. Chapter 7 Section 5 Earth`s MagnetosphereVI. Chapter 7 Section 6 The TideCurrent LectureI. Chapter 7 Section 4 Surface Activity Continueda. New crust created preserves magnetic fieldsb. Magnetic fieldsi. Electric charged particles creates electric fieldsii. No bare north or south poles; they always work in pairsiii. Charged particles spirals around fieldsc. Earthi. Solar wind is made up of electrons and protons – High kinetic energyII. Chapter 7 Section 5 Earth`s Magnetospherea. Magnetosphere is the region around the Earth where charged particles in solar wind are trappedi. Charged particles are trapped in the Van Allen belts1. They spiral around the magnetic field linesb. Magnetic pole don`t go directly up and downi. Near the poles; Van Allen belts intersect the atmosphere. Charged particles can escape and then create glowing lights that we know asaurorae lightsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.c. Magnetoception – sense which allows animals to detect magnetic fieldsd. Origin Dynamo Theoryi. Rotating conducting outer coreii. Causes Earth`s Magnetic fielde. Hydrospherei. All waterii. Fluctuations in water levels (Tides) are due to gravitational force on Earth from Moon-force on the near side of Earth is greater than force on the far sideIII. Chapter 7 Section 6 The Tidea. Tidal Force – variation in the Moon`s gravity across the Earthb. Sun has less effect due to it being farther awayi. It does modify lunar tidesii. About half of there Earth`s influencesc. Tides exert a “drag” force on the Earth slowing rotationi. Will continue until the Earth rotates synchronously with the Moon,so that the same phase will be visible to
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