What happens to most solar radiation when it gets to earth??
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Most of the solar radiation is bounced off of earth´s atmosphere.

Explanation:

Due to earth´s magnetic field, we are able to be protected from most of the solar radiation the sun emits.

70% is absorbed by the atmosphere and the surface, and 30% gets reflected back into space

Explanation:

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

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what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements