The first minerals to be mined were ________ and ________
A) gold, silver B) flint, chert C) copper, bronze D) lead, quartz
B
Environmental & Atmospheric Sciences
You might also like to view...
A mixture of HOT gas, ash and volcanic debris travelling at high speed is called:
a) pyroclastic flow b) mud flow c) debris flow d) lava flow e) lahar
Environmental & Atmospheric Sciences
Describe the behavior of water vapor in the atmosphere. What will be an ideal response?
Environmental & Atmospheric Sciences
The economic value of biodiversity and ecosystems services is difficult to assess because
A. nobody has studied them. B. we only recognize their value when they are gone. C. we don't directly pay for them. D. All of the statements are correct.
Environmental & Atmospheric Sciences
Sediment transportation in the coastal zone is called _______________. (two words)
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences