The statement, "hiking up a mountain in the southwestern United States is like walking from Mexico to Canada," is meant to demonstrate that ________ change(s) rapidly as you change altitude and latitude
A) carbon dioxide levels
B) levels of industrial air pollutants
C) oxygen levels
D) human population density
E) biomes
E
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Why do westerly winds prevail at upper altitudes?
A) absence of friction B) rotation of the earth and equator to pole temperature contrast C) rotation of the earth D) equator to pole temperature contrast E) lower air density
If the Disconformity is simplified as three steps
(1) Layers of sediment accumulate; (2) Sea level drops and an erosion surface forms; (3) Sea level rises and new sedimentary layers accumulate; then what is the right sequence for these steps? a. (3), (2), (1) b. (1), (2), (3) c. (2), (1), (3) d. (2), (3), (1)
Pastoral nomadism is a type of commercial agriculture
Indicate whether the statement is true or false
What is produced when benzene reacts with chlorine in the presence of an iron catalyst?
A) only chlorobenzene B) chlorobenzene and chlorine atoms C) chlorobenzene and hydrogen chloride D) chlorobenzene and water