IB Environmental Systems and Societies

1. IB Environmental Systems and Societies 3.4 and 3.5 Review Click here to begin

2. Click here for answer Name all five layers/horizons of a soil profile. 3.4.1: Question: 1

3. Click here for answer • Name at least two things that determine the primary productivity of soil. 3.4.2: Question 2

4. Click here for answer • Name at least three things that lead to soil degradation. 3.4.3: Question 3

5. Click here for answer • What are the purposes for mechanical, cropping, and soil husbandry methods? 3.4.4: Question 4

6. Click here for answer • Name at least two things that soil erosion and soil fertility loss, at Sierra de Santa in Veracruz, Mexico, have resulted in. 3.4.5: Question 5

7. Click here for answer • What is one difference between agriculture in MEDC’s and agriculture in LEDC’s? 3.5.1: Question 6

8. Click here for answer • Between terrestrial food production systems and aquatic food production systems, which of the two is more efficient and why? 3.5.2: Question 7

9. Click here for answer • What is the difference between intensive farms and extensive farms? 3.5.3: Question 8

10. Click here for answer • Define the term ‘shifting cultivation’. 3.5.4: Question 9

11. Next question • Organic horizon • Mixed mineral-organic horizon • Eluvial or leached horizon • Illuvial or deposited horizon • Bedrock or parent material 3.4.1: Answer 1

12. Next question • Mineral content • Drainage • Water-holding capacity • Air spaces • Biota • Potential to hold organic matter 3.4.2: Answer 2

13. Next question • Water erosion • Wind erosion • Acidification (toxification) • Eutrophication • Salinity • Atmospheric deposition (heavy metals and organic pollutants) • Desertification • Climate change 3.4.3: Answer 3

14. Next question • Soil conservation • Mechanical methods are used to reduce water flow • Cropping and soil husbandry methods are used against wind and water damage 3.4.4: Answer 4

15. Next question • Reduced agricultural productivity • Decreased availability of drinking water in nearby urban centres • Increased road maintenance • Falling hydroelectric potential • A decline in the fishing industry in coastal lagoons 3.4.5: Answer 5

16. Next question • MEDC’s: • Advanced technology • Low labour and high fuel costs • Grand-scale factory produced fertilizers and pesticides • LEDC’s: • Low levels of technology • Lack of capital • High levels of labour 3.5.1: Answer 6

17. Next question • Terrestrial: • Second law of thermodynamics 3.5.2: Answer 7

18. Next question • Intensive farming: • Small area of land • Aims to have very high output per unit area of land • Extensive farming: • Large in comparison to the money and labour put into them • Few workers are responsible for thousand of acres of land 3.5.3: Answer 8

19. Next question • Agriculture in which new land is cleared by cutting down small areas of forests and setting them on fire. • Ash is used as fertilizer • Cleared land spaces are used to farm crops 3.5.4: Answer 9

20. Back to the beginning Hope this helped  THE END