Which valuable mineral is commonly found as a placer deposit?
A. Limestone
B. Gold
C. Rock salt
D. Quartz
Answer: B
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Airplanes are struck by lightning
A) frequently. B) only during clear-sky flights. C) only during high altitude flights. D) only during takeoff and landing.
How did the Greeks estimate the size of the earth?
A) They measured the angle of the sun above the horizon at midday in two places with different latitude and used the angle to estimate the circumference of the earth. B) They used the height of sailing ships as they sailed over the horizon to estimate curvature of the earth, which allowed estimation of the size of the earth. C) They didn't; everyone thought the world was flat until Columbus' time. D) They measured the altitude of mountains in Greece, then used the distance they were lost from sight to estimate the curvature of the earth, which allowed estimation of the size of the earth.
At the point where a barometer reads 500 mb, approximately one half of the atmosphere lies below the barometer
Indicate whether the statement is true or false
What is the total area covered by campus buildings, in square meters? What will be an ideal response?