1- Which of the following nonmetallic resources has an igneous origin? Select on

Question

1- Which of the following nonmetallic resources has an igneous origin?

Select one:

a. limestone

b. granite

c. gypsum

d. salt

2- Although granite contains aluminum atoms, we do not mine granite to produce aluminum because ________.

Select one:

a. the concentration of aluminum is too small to be economical

b. granite is too difficult to mine

c. aluminum is found only in isolated veins

d. aluminum cannot be separated from the granite

3-

The presence of gold in western South America can be attributed to processes associated with ________.

Select one:

a. subduction

b. submarine vents

c. a hot spot

d. secondary enrichment

Explanation / Answer

1- Which of the following nonmetallic resources has an igneous origin?

Select one:

a. limestone

b. granite                        Answer: Granite

c. gypsum

d. salt

2- Although granite contains aluminum atoms, we do not mine granite to produce aluminum because ________.

Answer: a. the concentration of aluminium is too small to be economical

Select one:

a. the concentration of aluminum is too small to be economical

b. granite is too difficult to mine

c. aluminum is found only in isolated veins

d. aluminum cannot be separated from the granite

3-The presence of gold in western South America can be attributed to processes associated with ________.

Select one:

a. subduction              answer: Subduction

b. submarine vents

c. a hot spot

d. secondary enrichment

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