Unit 1 Section C Summary HW Problems Pt. 1

#1:
-Atmosphere: nitrogen and oxygen
-Hydrosphere: water and some dissolved minerals
-Lithosphere: petroleum and metal-bearing ores

#2:
a. The crust is the thin layer of the Earth that we live on, the mantle is a section of rock that is 2850 km thick which lays between Earth's crust and core, and the core is the hot center of the earth.
b. Although it is the thinnest layer, the crust provides us with the most resources

#3:
a. Peru
b. Chile
c. China

#4:
China.

#5:
An ore is a naturally occurring rock or mineral that can be mined and from which it is profitable to extract a metal or other material, while a mineral is a naturally occurring solid compound containing the element or a group of elements of interest.

#6:
-Quantity of ore at site
-Percent of metal in the ore
-Type of mining and processing needed to extract the metal from its ore
-Distance of the mine from metal refining facilities and markets
-Metal's supply-versus-demand status
-Environmental impact of the mining and processing

#7:
The safety conditions of the mine may have changed, or the value of gold may have risen.

#8:
How much there is of an ore with resources that are needed by the public.

#9:
Active metals would react with the chemicals or methods used to free the elements, while less active metals wouldn't be as difficult to extract.

#10:
The nonmetals would be hardest to extract because of their brittleness, the metalloids would be less hard than the nonmetals, and the metals would be easiest to extract because of their malleability without damaging the element.