Word: temperaturesâ
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...samples may also help determine whether lunar material was ever hot enough to have melted, or whether it has been relatively cool almost from the first. Moon specimens strikingly lacking in volatile elements such as potassium and arsenic could indicate that these substances had been expelled by high temperatures???and would support the theory of a volcanic moon. Those who believe that meteors gave the moon its cratered surface might still argue, however, that the volcanism had occurred only in areas struck?and heated?by huge meteors. Studies of the crystal size and average density of sample rocks will supply...
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