Mirages, halos, and rainbows are all optical phenomena produced by the refraction of light
Indicate whether the statement is true or false
True
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The shaded areas and diffusion arrows on the above world map indicate the most prominent regions of the
A) first agricultural revolution. B) second agricultural revolution. C) third agricultural revolution. D) Green Revolution. E) Industrial Revolution.
Which of the following places will have the greatest annual difference between summer and winter temperatures?
A) Miami, Florida (25°N, 80°W), located on the Atlantic coast B) Fargo, North Dakota (46°N, 96°W), located near the geographic center of North America C) Sacramento, California (38°N, 121°W), located eight miles from Pacific coast D) Orlando, Florida (28°N, 81°W), located sixty miles from the Atlantic coast E) San Francisco, California (38°N, 120°W), located on the Pacific coast
Indoor air is likely to be contaminated by all of the following except ________
A) particulate matter B) mercury C) microorganisms D) radon E) volatile organic compounds
Which type of seismic waves are propagated through the earth as alternate compressions and expansions of the rock and soil?
a. P waves b. S waves c. surface waves d. both a and b