With respect to air, water, and material resources, which of the following is true?
A) A forest is a closed system.
B) A forest is an open system.
C) A forest is an open system in terms of air, but closed in terms of material resources.
D) A forest is an open system in terms of water, but closed in terms of energy resources.
B
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Which of the following is true of the March equinox?
A) In the Southern Hemisphere, this date is known as the vernal equinox. B) At all latitudes between the poles, day and night are of equal length. C) The suns direct rays strike perpendicular at the Tropic of Capricorn (23.5° S). D) Moving south of the equator, the daylength increases, while moving north of the equator the day length decreases. E) Areas north of the Arctic Circle at 66.5° N have 24 hours of day light.
What factors are necessary for plankton productivity and therefore determine where productivity is high and where it is low?
Strip farming is a type of soil conservation or quality management practice.
Answer the following statement true (T) or false (F)
Zones of windless, hot, dry desert air between 25° N and 25° S latitude are named
A) the horse latitudes. B) Hadley cells. C) the doldrums. D) westerlies.