Among the reasons why the earths core is believed to consist mainly of molten iron is (are)

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Among the reasons why the earth’s core is believed to consist mainly of molten iron is (are) 

a. The density of iron
b. The electrical conductivity of iron
c. The relative abundance of iron in the universe
d. That earthquake S waves do not pass through the core

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Related Book For  answer-question

The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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