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ra1l [238]
3 years ago
12

How is Earth's crust recycled?

History
1 answer:
Zina [86]3 years ago
8 0

The Earth's crust is recycled when a new crust is created and the old crust is forced into the Earth's mantle, where it becomes molten rock again.

This fact occurs due to tectonic activities, and occurs in a cycle of 500 million years.

Some evidence found by researchers as signs of recycling of the earth's crust was through the analysis of rock samples in Canada, which had a chemical element similar to that existing in the crust 4.2 billion years ago.

Other evidence found was through volcanic activities, where scientists analyzed an isotope called Samarium-146 that was present in the formation of planet Earth, but which has since been extinct.

This scientific evidence therefore supports the fact that there is a recycling of the Earth's crust.

The correct alternative is:

  • As new crust is created, the old crust is forced down deep inside Earth's mantle, where it becomes molten rock again.

Learn more about Earth's crust here:

brainly.com/question/7786540

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