Studied by 27 peopleall ap environmental science math formulas
what is population density?
population / area
what is the rule of 70?
70 / growth rate %
what is population growth rate (%)?
[(births - deaths) / (immigrants - emigrants)] x 100
denominator can also just be “# of people”
what is rate of change?
(new- old) / new time - old time [basically just AROC]
what is percent change?
[(old - new) / old] x 100
what is the 10% rule?
states that only 10% of energy moves up the trophic level
what is net primary productivity (NPP)?
gross primary productivity - respiration
what is gross primary productivity (GPP)?
rate of photosynthesis by plants
what is fuel efficiency?
distance traveled / unit of fuel consumed
what is dimensional analysis?
quantity1 * conversion factor/quantity2 = result
what is half life?
A = Pert or t1/2 = ln(2)/x
what is LD50?
Dose/Weight
the bigger the dose, the safer the chemical
what is lethal dose?
mass x LD50
Note
Flashcard