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\nIs Earth's Magnetic Field Reversing?\n

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\n\nPublisher:\n\nPBS\n\n\n
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\nEarth’s magnetic field protects us from deadly space radiation. What if it were drastically weakened, as a precursor to flipping upside down? I mean, it has before … many, many times.. Spaceship Earth has a literal deflector shield. A...\nEarth’s magnetic field protects us from deadly space radiation. What if it were drastically weakened, as a precursor to flipping upside down? I mean, it has before … many, many times..
Spaceship Earth has a literal deflector shield. A geomagnetic field. Lines of magnetic force, forged by currents in the planet’s molten core, erupt from the surface close to the north south geographic poles, connecting to each other to wreath the planet in a dipole field, like a gigantic bar magnet. Magnetic fields exert a force on moving charged particles, causing them to spiral around those force lines. That’s helpful, because Earth is constantly bombarded by very fast moving charged particles, especially coming from the Sun. Our magnetic field deflects the worst of these. Not all planets are so lucky. Mars, with its solid core, has no such shield – and so the red planet’s atmosphere was stripped away by the solar wind billions of years ago.\n
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Resource Details

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Curator Rating
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Educator Rating
Not yet Rated
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Media Length
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12:46
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Grade
12th - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nPBS Space Time\n\n
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Date
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2019
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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space, quantum mechanics, time, iron, years, scientists, north, motion, outer space, astrobiology, black holes, the universe, science fiction
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physics, astrophysics, space physics, pbs, space time, pbs space time, matt o’dowd, einstein, einsteinian physics, general relativity, special relativity, dark energy, dark matter, math, calculus, maths, holographic universe, holographic principle, holography, holographs, reality, consciousness, eht black hole, event horizon telescope, geological record, magnetic materials, bar magnet, coriolis force, dynamo effect, outer core, magnetic field, electrical currents, effect, core, field, solid, rotation, past, flows, understand, rotating, close, year, direction, surface, planet, earth, happen, flip
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