Answer:
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Explanation:
The overall specific gravity of the earth is much higher than the specific gravity of crustal rocks which means the earth is about twice as heavy as the rocks on the surface would suggest. Iron meteorites are thought to have the same composition as the average earth, and the meteorites contain a lot more iron than the Earth's surface rocks.
Abundant most likely means: more than sufficient without being excessive. plentiful implies a great or rich supply.
The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons<span>, eras, periods, epochs, and ages.
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It seems that you have missed the given options for this but anyway, here is the correct answer. <span>The Atlantic Ocean is currently growing wider as its floor enlarges due to the process of sea-floor spreading. In sea-floor spreading, pieces of oceanic crust MOVE APART ALONG A DIVERGENT PLATE BOUNDARY. </span>
