ronitgoswami
31.03.2020 •
Biology
. How have scientists determined the composition of earth's mantle and core?
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Ответ:
Hope this helps!
Explanation: Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula.
Ответ:
Radioactive Dating
Explanation: