What are the economic uses of three common nonsilicate minerals?
Silver was used for photography, fluorite was used as an ore of lead, and anhydrite is used in plaster.
Halite is used for common salt, anhydrite is used in plaster, and graphite was used as an abrasive.
Fluorite is used in steelmaking, dolomite is used in plaster, and corundum is used as an abrasive.
Halite is used for common salt, gypsum is used in plaster, and graphite was used as pencil lead.
Galena is used as pencil lead, halite is used as common salt, and calcite is used in Portland cement.
Halite is used for common salt, gypsum is used in plaster, and graphite was used as pencil lead.
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Stratospheric ozone depletion is currently most serious ________
A) over New Zealand and Australia B) over the Arctic Ocean C) over North America D) over tropical latitudes E) over the most populated and urbanized regions
Which of these statements come the closest to the purpose of geography?
a. The study of landforms and distributions of landforms. b. The study of categories of facts for future reference. c. The study of the location and arrangement of phenomena and the processes that generate these phenomena. d. The study of locations of activities of an economic character. e. The study of the history of the earth.
In the mid-1600s, James Ussher determined that the earth was created in 4004 BC based on ________
A) fossils B) Biblical passages C) rates of deposition and erosion of earth materials D) ancient records from the Egyptians E) none of the above
Why did periods of glacial advance in higher latitudes of the Northern Hemisphere tend to occur with cooler summers, but not necessarily with cooler winters??
What will be the ideal response?