An example of a material that has been both a resource and a reserve, depending on abundance,
economic conditions, and mining technology, is:
a. platinum.
b. gold.
c. petroleum.
d. iron.
e. all of the above
E
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Thick salt deposits have been explained by evaporation in silled (also called “barred”) basins. Indicate whether the statement is true or false
Moist continental climates support several distinct communities of needleleaf, broadleaf, and mixed forests in this biome found in North America, Europe, and Asia
A) tropical savanna B) midlatitude broadleaf and mixed forest C) tropical rain forest D) midlatitude grassland
How do stalactites and stalagmites form?
What will be an ideal response?
Higher mortality rates affecting older Russian men is attributed to:
A) increasing poverty and alcoholism B) material consumption C) nostalgia for Soviet Union D) increased industrial production