Primary Productivity
What is the net productivity formula?
GPP - Resp = NPP
What is the percent change formula?
(new - old)/ old X 100
If a country were doubling its population every 10 years, what is the growth rate? _____%
7
What is the birth rate formula? (Or the death rate formula)
births/total population = birth rate
Deaths/ total population = death rate
A solution with a pH of 4 is ____________ times more acidic than one with a pH of 7
1,000
The gross primary productivity of an ecosystem is 3.5 kgC/m2/year, and the energy needed by the producers for their own respiration is 3.0 kgC/m2/year. What is the net primary productivity of such an ecosystem? __________________ kgC/m2/year
0.5
The amount of wilderness area increased from 40,000 km2 to 60,000 km2. What is the percent increase? ___________%
What is the growth rate for a country that has 60,000 births and 50,000 deaths per year along with 20,000 people who immigrate in and 10,000 people who emigrate out? The total population is 20,000,000. ______%
0.1
What is the birth rate for a country that has a population of 120,000 and 2400 births per year? __________ %
A water tank holds 500 gallons and is 35% full. How much water is in the tank?
175 gallons
The net primary productivity of an ecosystem is 1 kgC/m2/year, and the energy needed by the producers for their own respiration is 1.5 kgC/m2/year. The gross primary productivity of such an ecosystem would be __________________________kgC/m2/year
2.5
A 2500 hectare piece of wild chaparral was bought by a developer to turn into homes. The developer build on 1500 hectares and left 1000 hectares untouched. What was the percent decline in wild chaparral? _______________ %
40
Belgium has a growth rate of 0.1% In how many years will it double its population?
700
What is the population growth rate formula?
(Births - Deaths)/total population = Crude Growth Rate (r)
OR
((Births + Immigration) – (Deaths + Emigration))/total population = Growth Rate (r) with migration factored
10% of a barrel of oil is turned into plastic. A barrel contains 42 gallons. How many gallons are NOT turned into plastic?
37.8
The net annual primary productivity of a particular wetland ecosystem is found to be 2,000 kcal/m2. If respiration by the aquatic producers is 18,000 kcal/m2 per year, what is the gross annual primary productivity for this ecosystem, in kcal/m2 per year? ____________ kcal/m2/year
20,000
A light bulb is rated at 100 watts. It is on for 5 hours/day on average. How many kWh does this light bulb use each month? (30 days) ______________ kWh/month
15
The country of Togo in Western Africa has a growth rate of 3.5%. It's present population is 4.8 million. How many years will it take for Togo to double its population?
20
What is the death rate for a country that has a population of 1,500,000 and 60,000 deaths per year? ______ %
4
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
12.5g
Imagine we run an experiment on the algae Cladophora glomerata. We place equal amounts of algae into a light bottle and a dark (covered) bottle. We measure the dissolved oxygen in both bottles and find it is at 10 mg/L (Initial). We let both bottles sit for a week. In one week, the light bottle has a dissolved oxygen value of 11 mg/L and the dark bottle has a value of 5 mg/L. CALCULATE the amount of respiration, the NPP (Light – Initial) and the GPP (Light – Dark) for the species of algae.
Light = NPP = 11-10 = 1mg/L/wk
Dark = respiration = 10-5 = 5mg/L/wk
1=GPP-5
GPP=6mg/L/wk
The project will consist of 200 wind turbines, each with a capacity of 4 megawatts (MW). Each turbine costs $1.2 million to build. Electrical demand in the area to be served by the project is expected to be 2.0 x 106 MWh per year. Calculate how much electricity (in MWh) the wind project needs to generate per year in order to provide 80% of the annual electrical demand in the service area.
(0.80) x (2.0 x 106 MWh) = 1.6 x 106 MWh
Libya is doubling its population every 19 years. What is the growth rate? _______%
3.7
What is the growth rate for a country that has a total population of 11,000,000 with 320,000 births and 650,000 deaths?________ %
-3
After 24.0 days, 2.00 milligrams of an original 128.0 milligram sample remain. What is the half-life of the sample?
4 days