What three components make up most magmas?
A) Silicon, potassium feldspar, and muscovite
B) Water, melted rock, and solid crystals
C) Lava, ash, and gas
D) Liquid portion, solid portion, gaseous portion
Answer: D
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The United States imports some minerals of which it has ample supplies and production exceeding current demands.
Answer the following statement true (T) or false (F)
For the geographer, domestication involves taming and training animals, but not the planting and harvesting of crops
Indicate whether the statement is true or false.
The salts in the ocean are similar to those of concentrated river water
a. True b. False
Food security has to do with
A. A country's dependence on cash crop exports. B. Preventing wars over diminishing food supplies. C. The total volume of food a country imports. D. The total volume of aid a country receives. E. The ability of a population to obtain food on a day-to-day basis.