The refraction of light is due to changes in wave
A. direction.
B. speed.
C. frequency.
D. all of the above
Answer: B
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What aluminosilicate polymorph is stable at a pressure of 4 kilobars and a temperature of 400 degrees C?
A) kyanite B) andalusite C) sillimanite D) kyanite and andalusite stable
How is the daily temperature range affected by the presence of clouds?
A) The temperature range is lower when clouds are present. B) The temperature range is greater when clouds are present. C) The temperature range is not affected by the presence or absence of clouds. D) Temperature range is not affected in a predictable way by the presence of clouds.
Since the industrial revolution, greenhouse gas emissions from human activity consist mostly of
a. carbon dioxide. b. methane. c. nitrous oxide. d. hydrochlorofluorocarbon HFC-23.
True or False: The final accretion of Earth is thought to have included giant embryo collisions
Indicate whether this statement is true or false.