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Biology, 11.09.2019 18:30 Knownothing

Heat energy drives earth systems. what are two sources of that heat?
a. the sun and heat left over from the formation of the earth
b. trade winds and heat left over from the formation of the earth
c. chemical reactions in the atmosphere and fission
d. the sun and fission

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Heat energy drives earth systems. what are two sources of that heat?
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