Net primary productivity is the

A) total amount of energy fixed for photosynthesis in an area, minus the energy wasted or used.
B) for plant respiration and maintaining existing tissue.
C) total amount of energy fixed for photosynthesis in an area.
D) percentage of the total vegetation surface that is a healthy green color.
E) ratio of the population of autotrophs to the population of heterotrophs in an ecosystem.


A) total amount of energy fixed for photosynthesis in an area, minus the energy wasted or used.

Environmental & Atmospheric Sciences

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Laccoliths are dikes that inflate, causing the overlying rock to bow upward

Indicate whether the statement is true or false

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________ is a liquid by-product of sanitary landfill wastes

Fill in the blank(s) with correct word

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The designation for a cool, moist air mass is

a. ?mT. b. ?mP. c. ?cT. d. ?cP. e. ?cA.

Environmental & Atmospheric Sciences

The altitudinal difference (relief) between the top of the tallest mountain and the bottom of the deepest ocean trench is closest to ________ kilometers (miles)

A) 20 (12) B) 200 (122) C) 2,000 (1,220) D) 20,000 (12,200) E) 200,000 (122,000)

Environmental & Atmospheric Sciences