Author Question: About 20 out of the thousands of known mineral species make up the bulk of the Earth's crust. ... (Read 63 times)

ghost!

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About 20 out of the thousands of known mineral species make up the bulk of the Earth's crust. Indicate whether the statement is true or false.

Question 2

Oxygen and silicon alone comprise 75 of crustal rocks by weight. Indicate whether the statement is true or false.



zacnyjessica

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Answer to Question 1

T

Answer to Question 2

T



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