4. The concentration factor is a the concentration of a metal in the continental crust divided by its concentration in an ore deposit. b the concentration of a metal in an ore deposit divided by its average concentration in the continental crust. c the action or power of focusing one's attention or mental effort. d the concentration of a nonmetal in an ore deposit multiplied by its average concentration in the oceanic crust. 5. Mineral reserves are a the average length of time a substance persists in a system. b a force or body of troops kept back from action to reinforce or protect others, or additional to the regular forces and available in an emergency. c the quantity of a material that has been found and is currently recoverable economically with existing technology. d things that you should refrain from using or disposing of (something); retain for future use.
|
a
|
the concentration of a metal in the continental crust divided by its concentration in an ore deposit. |
|
b
|
the concentration of a metal in an ore deposit divided by its average concentration in the continental crust. |
|
c
|
the action or power of focusing one's attention or mental effort. |
|
d
|
the concentration of a nonmetal in an ore deposit multiplied by its average concentration in the oceanic crust. |
5. Mineral reserves are
|
a
|
the average length of time a substance persists in a system. |
|
b
|
a force or body of troops kept back from action to reinforce or protect others, or additional to the regular forces and available in an emergency. |
|
c
|
the quantity of a material that has been found and is currently recoverable economically with existing technology. |
|
d
|
things that you should refrain from using or disposing of (something); retain for future use. |
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
