The term ________ refers to a group of elements called ...

[burton19126]

The term ________ refers to a group of elements called lanthanides and actinides that are not often found in large, commercially valuable quantities.
 
  A) special earths
  B) restricted minerals
  C) rare earths
  D) earth obscures
  E) nonelastic minerals

Question 2

Total world reserves of lithium are sufficient to last ________ years at current consumption rates.
 
  A) 12
  B) 50
  C) 200
  D) 2,500
  E) 500

[b614102004]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: E