APES EQUATION STUDY FUUUUUUU Flashcards
study for APES!!!!!!!!!! FUCK! (15 cards)
Feet in Yard
3 ft
Acres in hectare
2.47 acres
= (part/whole)100
Percent of a whole
= (last value- first value)/first value x 100
Percent change
= GPP - R (rearrange: R= GPP - NPP)
Net primary productitvity
= NPP + R (R= respiration)
Gross primary productivity
= 70/% growth (keep in percent form, not decimal)
Rule of 70 (population doubling time)
= # of individuals/total area
Population density
(CBR- CBD)/ 10
(CBR= Crude birth rate, CBD= crude death rate, per 1000 ppl)
Crude birth rate
(B+I) - (D+ E)/ total population *100
(B+I= birth and immigration, D+E= death and emigration)
Growth Rate
1 watt
= 1 J/s
1 calorie
4.184 J
1 BTU
1.05 kJ
1 term
100,000 BTU
= kW * hours of use
Kilowatt hour (kWh)