1. What are the two key characteristics that determine a biome? - Rainfall and Temperature
2. Iowa has the right climate to be a lot of different biomes. Why is Iowa historically a prairie? - Fire
3. What is the name of the layer of frozen ground in the tundra? - Permafrost
4. True or False: Tropical rain forests have rich soils. - False
5. What drives the variance in prairie (tall grass vs. short grass) in North American grasslands? - Rain
6. Who was the first person to worry about population growth? - Thomas Malthus
7. What is the rate of natural increase equation? - Births - Deaths
8. What is the number of children an average woman in the population would be expected to have over
her reproductive lifetime? - Total Fertility Rate
9. What is the relationship between Total Fertility Rate (TFR) and education rates in women/ girls? - As
education rates increase, TFR decreases
As education rates decrease, TFR increases
10. What is the rate of population growth currently? - 1.1% and is decreasing
11. Which continent is predicted to grow the fastest by the end of the century? - Africa
Where does the United States rank in terms of population of the 196 countries? - 3rd
, 13. True or False: Every country's population will increase in the next 50 years. - False
14. How can we most effectively lower Total Fertility Rate? - Education of Women
15. True or False: Most people live in rural areas. - False
16. True or False: More people in the world have access to a cell phone than have access to an indoor
toilet - True
17. True or False: Soil is considered a renewable resource. - False
18. According to Lee Burras, what is soil? - Terrestrial media capable of supporting plant life
19. What fraction of nutrients come from the soil? - 12/17
20. Which situation would cause a faster death in plants? - No gas exchange
21. Which component of soil has a large pore space? - Sand
22. Which component of soil is chemically reactive and has poor aeration? - Clay
23. Which component of soil holds plant available water? - Silt
24. Squaw Creek has lost a lot of OM. Where is most of the OM now? - As CO2 in atmosphere
25. What causes more flooding? - Decrease in soil porosity
26. True or False: Soil is chemically reactive. - True