|
12. Minerals: The Materials of Earth 17. Sedimentary Rocks: The Key to Past Environments 19. Running Water I: Rivers, Erosion and Deposition |
Episode 22. Wind, Dust and DesertsWhere are most deserts located? What is a desert? Describe how proximity to the equator affects the formation of deserts. Describe the rain shadow effect and the formation of deserts. What other factors influence the location and formation of deserts? Describe the affect of precipitation on the desert. What are alluvial fans? Why do most deserts have interior drainage patterns? How is sand transported by wind? What are playas? Describe the formation of desert pavement. Describe the formation of desert varnish. How can the removal of vegetation lead to desertification? How did ranching and farming practices contribute to the Dust Bowl of the 1930s? How is modern technology contributing to the desertification of sub-Sahara Africa? Discuss efforts to reduce desertification on a global scale. Why do you think that desert lands are so fragile? Download the PDF version here |