________ heat is produced by the spontaneous breakdown, or decay, of radioactive elements such as uranium and thorium that are naturally occurring inside Earth.
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Q9: Whenever an electrically charged particle is accelerated,
Q10: A group of electromagnetic rays arranged in
Q11: A perfect _is one that absorbs all
Q12: _ is the mutual physical attraction between
Q13: The increase in temperature as you go
Q15: For any planetary body, the percentage of
Q16: _gases selectively absorb radiation in the longer-wavelength,
Q17: The _ cycle encompasses the inputs and
Q18: _come from the remains of plants and
Q19: _ energy is drawn from Earth's own
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