A ______ separates Earth into two hemispheres.
a. solstice
b. great circle
c. small circle
d. perihelion
e. loxodrome
b. great circle
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Agricultural sustainability depends upon an understanding and proper management of which of the following cornerstones of both ecosystem and food production?
A) Irrigation systems B) Agricultural soils C) The generation of new plant hybrids using genetic engineering D) The agricultural technology necessary to plow, plant, and harvest
In which of the following atomic particles is the number of protons not equal to the number of electrons?
a. ion b. atom c. isotope d. neutron
Which of the following will occur if the temperature of a gas is increased from 20 K to 40 K at constant pressure?
A) The volume will double. B) The volume will be halved. C) The volume will decrease slightly. D) The volume will increase slightly.
Which of the following processes is primarily responsible for the sky's blue color?
A. reflection B. filtering C. absorption D. scattering