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15 Cards in this Set
- Front
- Back
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The layer of the earth responsible for generating the intense magnetic field that protects the earth from the sun's output is....
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the outer core
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The layer of earth that is responsible for making the outer core hot enough to stay liquid is the....
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inner core
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The core is nearly as hot as the....
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sun
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Earth's magnetic field is created by the moving _____ metal of the inner core in a ____ earth.
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liquid
spinning |
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When the solar wind makes contact with earth's magnetic field at the poles (where field lines are perpendicular to the surface), then ____ are produced, and are visible at night there.
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auroras
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The northern or southern lights at night are called the...
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Aurora Borealis (N)
Auroa Astralis (S) |
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The ____ grows by about 1 mm per year, and this growth pushes everything on it outward a little bit.
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core
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The protective force field generated by the core is a layer above earth's atmosphere called the.....
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magnetosphere
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Astronauts that leave earth's magnetosphere don't have must protection from radiation and can develop problems with their....
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eyes
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Most g___, x___, c___ rays get stopped by the magnetosphere and the atmosphere, but _____ light still gets through and is worst soon after noon.
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gamma, xray, cosmic
UV |
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Magnetic ________ can occur about every 700,000 years. The next one should happen in about 1500 years.
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reversals
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When a reversal of our poles occurs, the earth will not have protection for (how long?)....
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several months
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Without protection provided by our core, ____ would not exist on earth.
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life
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Magnetic reversals have been recorded (where?)...
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in the rocks on the bottom of the ocean
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We have a place on our planet where the earth is NOT well protected from the sun. It is called the _____ _____ ____
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South Atlantic Anomaly
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