welcome! the topic for today is…. soil and population profiles soil texturepopulation profiles...
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Welcome!The Topic For Today Is…
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Soil and Population ProfilesSoil Texture Population
ProfilesWhat Plants Need
World in Balance
Misc.
200 200 200 200 200
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1000 1000 1000 1000 1000
Bonus Question: 5000 pts
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Topic 1: 200• Question:• What is soil texture?• Answer• The relative size of the mineral particles that
make up the soil.
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Topic 1: 400• Question:• What are the three different words used to
describe soil mineral (inorganic) particles?• Answer• Sand (largest), silt (medium), clay (smallest)
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Topic 1: 600• Question:• What type of soil texture has good nutrient-
holding and water-holding capacity?• Answer• Clay (best), silt (good), sand (poor)
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Topic 1: 800• Question:• How does water-holding capacity relate to
aeration?• Answer• As one goes up, the other goes down (inverse
relationship).
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Topic 1: 1000• Question:• How does water-holding capacity relate to
water infiltration?• Answer• Inverse relationship (sand lets water flow right
through, doesn’t hold on to the water).
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Topic 2: 200• Question:• What does a population profile show?• Answer• The number of people in each age group in a
country.
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Topic 2: 400• Question:• What does the population profile of a
developing country like Kenya look like?• Answer• Pyramid
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Topic 2: 600• Question:• What does the population profile look like if a
country’s TFR has been stable at replacement level fertility?
• Answer• Column
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Topic 2: 800• Question:• What is the shape of a population profile in a
country with a graying population?• Answer• Inverted pyramid (kite)
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Topic 2: 1000• Question:• What happens to the population profile in a
country severely affected by the AIDS virus? • Answer• It loses a large number of working-age adults
(gets a “waist”)
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Topic 3: 200• Question:• The ability of soil to hold on to nutrients• Answer• Nutrient-holding capacity
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Topic 3: 400• Question:• What 2 factors influence nutrient-holding
capacity in soil?• Answer• Organic matter (humus)• Particle size (small is better)
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Topic 3: 600• Question:• The ability of soil to hold on to water• Answer• Water-holding capacity
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Topic 3: 800• Question:• The property of soil that lets roots “breathe”• Answer• Aeration
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Topic 3: 1000• Question:• The relative acidity of soil• Answer• pH
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Topic 4: 200• Question:• In India, how are fertility and education
related?• Answer• Inverse relationship
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Topic 4: 400• Question:• In sub-Saharan Africa, the age structure is
such that even if TFR falls to 2 instantly, the population will double in this century. This is due to….
• Answer• Population momentum.
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Topic 4: 600• Question:• What can change the status of women in a
country like India?• Answer• Access to education and job training
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Topic 4: 800• Question:• Describe the message of one family planning
poster• Answer• Answer varies
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Topic 4: 1000• Question:• What are reasons that the poor in developing
countries have large families?• Answer• Security in old age, infant mortality, helping
hands, cost of education, status of women, lack of available contraception
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Topic 5: 200• Question:• The property of soil that describes how easy it
is to cultivate• Answer• Workability…think about our clay soil
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Topic 5: 400• Question:• The process of soil being washed or blown
away• Answer• Erosion
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Topic 5: 600• Question:• The 2 things lost from soil first when soil
erodes are• Answer• Organic matter and small inorganic particles
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Topic 5: 800• Question:• Why does erosion lead to desertification?• Answer• The soil components lost first are the ones
that contribute to water-holding capacity.
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Topic 5: 1000• Question:• What makes soil too salty?• Answer• Irrigation: dissolved salt is left behind when
irrigation water evaporates.
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Bonus Question: 5000 pts.
• Question:• List 5 things that encourage fertility rates to
decline• Answer• Security in old age, decreased infant/child
mortality, universal education, opportunities for women, access to contraceptives
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Daily Double
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Daily Double