Which continent likely represents the largest absolute land area experiencing degradation?
a. Europe
b. North America
c. Asia
d. South America
e. Africa
Answer: c. Asia
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Alpha and beta rays are deflected in opposite directions in a magnetic field because
A. they spin in opposite directions. B. alpha particles contain nucleons and beta particles do not. C. they have opposite charges. D. all of the above
How many different aldehydes have the molecular formula C4H8O?
A) 1 B) 2 C) 3 D) 4
Heating degree days are determined by subtracting the ____ temperature for the ____ from 65 degrees Fahrenheit
a. coldest; year b. mean; year c. warmest; week d. coldest; day e. mean; day
With the passage of time, all talus migrates ________
A) downslope B) upslope C) out of the ravine D) very quickly E) only when there are earthquakes