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Author Question: How many elements make up most of Earth's crust? A) 4 B) 12 C) 40 D) ... (Read 60 times)

crobinson2013

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on: Jul 16, 2018
How many elements make up most of Earth's crust?
 
  A) 4
  B) 12
  C) 40
  D) 100

Question 2

How is the valuable part of an ore mineral removed?
 
  A) by heating the ore in boiling temperatures
  B) by breaking its mineral bonds
  C) by dissolving the ore in water and acid
  D) by using a magnet to remove the metal


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meow1234

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: B


crobinson2013

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Reply 2 on: Jul 16, 2018
Excellent

Viet Thy

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Reply 3 on: Yesterday
Gracias!

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