APES formulas
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Flashcards covering population density, growth rate, rule of 70. rate of change, percent change, net primary productivity and fuel efficiency.
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9 Terms
1
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Population Density
Population/Area
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Rule of 70
70/percent growth rate
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Population Growth Rate
(Crude Birth Rate - Crude Death Rate) / Total Population * 100
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Rate of Change
(Final Value - Initial Value) / (Final Time - Initial Time)
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Percent Change
(Final - Initial) / Initial * 100
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Net Primary Productivity (NPP)
Gross Primary Productivity - Respiration
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Fuel Efficiency
Distance Traveled / Amount of Fuel Used
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Half-life (t½)
Time it takes for a substance to reduce to half of its initial quantity.
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LD50
Dose/Weight