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Understanding Soil and Population Trends

Explore the relationship between soil characteristics and population profiles in different countries. Learn about soil texture, nutrient holding capacity, population structures, and factors influencing fertility rates. Discover how erosion affects soil quality and how population momentum impacts demographic changes.

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Understanding Soil and Population Trends

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Presentation Transcript

  1. Welcome! The Topic For Today Is…

  2. Soil and Population Profiles

  3. Topic 1: 200 • Question: • What is soil texture? • Answer • The relative size of the mineral particles that make up the soil. Back

  4. Topic 1: 400 • Question: • What are the three different words used to describe soil mineral (inorganic) particles? • Answer • Sand (largest), silt (medium), clay (smallest) Back

  5. Topic 1: 600 • Question: • What type of soil texture has good nutrient-holding and water-holding capacity? • Answer • Clay (best), silt (good), sand (poor) Back

  6. Topic 1: 800 • Question: • How does water-holding capacity relate to aeration? • Answer • As one goes up, the other goes down (inverse relationship). Back

  7. 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). Back

  8. Topic 2: 200 • Question: • What does a population profile show? • Answer • The number of people in each age group in a country. Back

  9. Topic 2: 400 • Question: • What does the population profile of a developing country like Kenya look like? • Answer • Pyramid Back

  10. 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 Back

  11. Topic 2: 800 • Question: • What is the shape of a population profile in a country with a graying population? • Answer • Inverted pyramid (kite) Back

  12. 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”) Back

  13. Topic 3: 200 • Question: • The ability of soil to hold on to nutrients • Answer • Nutrient-holding capacity Back

  14. Topic 3: 400 • Question: • What 2 factors influence nutrient-holding capacity in soil? • Answer • Organic matter (humus) • Particle size (small is better) Back

  15. Topic 3: 600 • Question: • The ability of soil to hold on to water • Answer • Water-holding capacity Back

  16. Topic 3: 800 • Question: • The property of soil that lets roots “breathe” • Answer • Aeration Back

  17. Topic 3: 1000 • Question: • The relative acidity of soil • Answer • pH Back

  18. Topic 4: 200 • Question: • In India, how are fertility and education related? • Answer • Inverse relationship Back

  19. 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. Back

  20. Topic 4: 600 • Question: • What can change the status of women in a country like India? • Answer • Access to education and job training Back

  21. Topic 4: 800 • Question: • Describe the message of one family planning poster • Answer • Answer varies Back

  22. 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 Back

  23. Topic 5: 200 • Question: • The property of soil that describes how easy it is to cultivate • Answer • Workability…think about our clay soil Back

  24. Topic 5: 400 • Question: • The process of soil being washed or blown away • Answer • Erosion Back

  25. Topic 5: 600 • Question: • The 2 things lost from soil first when soil erodes are • Answer • Organic matter and small inorganic particles Back

  26. 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. Back

  27. Topic 5: 1000 • Question: • What makes soil too salty? • Answer • Irrigation: dissolved salt is left behind when irrigation water evaporates. Back

  28. 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 Back

  29. Daily Double

  30. Daily Double

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