phe2rpana4shjessHama phe2rpana4shjessHama

25-03-2016
Geography

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Exit Which of the following is NOT a source of Earth's internal heat?
a. mantle convection
b. radioactive substances
c. gravitational contraction
d. past bombardment by asteroids

Respuesta :

masonhamilton7 masonhamilton7

25-03-2016

it is b
radioactive substances don't heat the earth

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