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The "streak test" is a method used to determine the color of a mineral in powdered form. The color of a mineral's powder is often a very important property for identifying the mineral. The streak test is done by scraping a specimen of the mineral across a piece of unglazed porcelain known as a "streak plate."
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ur welcome
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Hi bro /siso plss post in the English Hope it helpfull too
<span>Melting snow C. cools the surrounding air.</span>
I think c. Is right because pollution can contaminate the entire world if we don't work together
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Melting would have caused denser substances to sink toward the center while less-dense materials would have migrated to the crust.
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