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  • 05-08-2016
  • Physics
Answered

  1. Placer deposits form when ____. (1 point)

hot, metal-rich fluids cool underground

heavy eroded particles settle out of moving water

organic matter is compressed over millions of years

magma cools in underground chambers

  1. Which of the following is a nonmetallic mineral resource? (1 point)

wood

coal

iron

aggregate

Verified Answer :

Hussain514 Hussain514
  • 07-08-2016

21 is problematic as coal is legally a mineral resource but not geologically a mineral. That wouldn't be too bad if aggregate wasn't also legally a mineral resource but not geologically a mineral. 

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