What two elements make up the mineral quartz?
A. oxygen, silicon
B. silicon, nitrogen
C. sodium, calcium
D. potassium, oxygen
Answer: A
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A person experiences a popping feeling in their ears during the takeoff or landing of an airplane or while driving on steep mountain roads due to changes in the ________ of the atmosphere
A) density B) movement C) pressure D) temperature E) water vapor content
The ______ Treaty, negotiated in 1959 and signed by 45 countries, including the seven laying claims to the area, forbids any exploitation of the continents natural resources until 2048
Fill in the blank(s) with correct word
The first estuary in the United States to be targeted for protection and restoration was Chesapeake Bay.
Answer the following statement true (T) or false (F)
If you were hiking through the Rocky Mountains and saw a sharp ridge of peaks that looked a bit like the teeth of a saw, you might reasonably conclude that it had been shaped by what?
A) Erosion from winter snow packs. B) A strike-slip fault that caused uplift. C) Two parallel glaciers in the valleys on each side. D) Tectonic activity.