Observed in a vertical cross section, soil is made up of distinct layers. From the surface downward, the layers are designated ____
A)O, E, A, B, and C
B)A, B, C, O, and E
C)O, A, E, B, and C
D)A, O, E, B, and C
E)E, A, B, O, and C
C
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The blood cells involved in defending the body from pathogens are
A. fibrin. B. platelets. C. white blood cells. D. red blood cells.
During December solstice, the
A) entire area poleward of the Antarctic Circle remains out of sunlight. B) entire area poleward of the Tropic of Capricorn remains out of sunlight. C) entire area poleward of the Arctic Circle remains out of sunlight. D) entire area poleward of the Tropic of Cancer remains out of sunlight.
Why is the geologic history of a volcano important in hazard prediction?
A) The geologic history helps to determine whether evacuation is necessary. B) The geologic history reflects the history of subduction beneath a volcano. C) The geologic history is an important indicator of seismic activity. D) The geologic history reveals the frequency and style of eruptions.
If the axis of the Earth were not tilted, Earth would not experience ________
A) day/night variations B) rotation C) aphelions D) perihelions E) seasons