A small hill, knob, or mound of glaciofluvial sorted sand and gravel that is formed on or inside a glacier and is later left on the surface after the glacier retreats is a(n)
A) esker. B) kame. C) kettle. D) drumlin. E) col.
B
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Viral diseases are particularly difficult to combat because they
a. are not affected by antibiotics b. kill large numbers of people c. evolve rapidly d. all of these answers e. none of these answers
The rain-shadow effect on the Isthmus is most pronounced
A) in the summer, on the Pacific side of the Isthmus. B) in the winter, on the Pacific side of the Isthmus. C) in the summer, on both sides of the coasts of the Isthmus. D) in the winter, on both sides of the coasts of the Isthmus.
The rocks of the core are more dense than the rocks of the mantle
Indicate whether the statement is true or false
In terms of total land and ocean area, which of the following climate classifications is the most extensive?
A) Microthermal climates B) Mesothermal climates C) Dry climates D) Tropical climates