What kind of process produces banded iron formations?
a. sedimentary
b. hydrothermal
c. igneous
d. weathering
e. metamorphic
Q. 2 -
If the crustal abundance of some substance is 5 and a good ore deposit contains 25, what is the
concentration factor needed to economically mine this substance?
a. 0.20
b. 1
c. 2
d. 5
e. 25
Q. 3 -
What is the ratio of an element's abundance in an ore deposit to its average continental-crustal
abundance?
a. enrichment multiple
b. concentration factor
c. economic feasibility quotient
d. use per capita
e. Poisson's factor
Q. 4 -
What is a locally rich concentration of metallic minerals that can be mined economically and is legally
recoverable with existing technology?
a. ore
b. ore minerals
c. mineral deposits
d. mineral reserves
e. vein
Q. 5 -
What is a locally rich concentration of minerals that can be mined economically and is legally
recoverable with existing technology?
a. ore
b. ore minerals
c. mineral deposits
d. mineral reserves
e. vein
Q. 6 -
Which proposed geoengineering techniques to lower greenhouse gas concentrations in the atmosphere
involve polluting the air or water with chemicals in order to reduce the effects of global warming? What will be an ideal response?
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