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IB ESS Formulas questions well answered already passed

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IB ESS Formulas questions well answered already passed

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  • October 6, 2024
  • 2
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • IB ESS
  • IB ESS
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BravelRadon
IB ESS Formulas

Net primary productivity - correct answer ✔✔calculated by subtracting respiratory losses (R) from gross
primary productivity (GPP).



NPP = GPP - R



Gross secondary productivity (GSP) - correct answer ✔✔the total energy or biomass assimilated by
consumers and is calculated by subtracting the mass of fecal loss from the mass of food consumed



GSP = food eaten - fecal loss



Net secondary productivity (NSP) - correct answer ✔✔calculated by subtracting respiratory losses (R)
from GSP.



NSP = GSP - R



CBR (crude birth rate) - correct answer ✔✔= no of births / population size x1000



CDR (crude death rate) - correct answer ✔✔=# of deaths / population size x 1000



NIR (natural increase rate) - correct answer ✔✔= CBR - CDR/10 (migration is ignored)



TFR (total fertility rate) - correct answer ✔✔= average no of children/woman



DT (doubling time) - correct answer ✔✔= time in years to double the population size



Respiration - correct answer ✔✔glucose + oxygen -> carbon dioxide + water

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