Question

4. View the topographic map of Antarctica. What is the best use of this type of map? (Lesson 5) 5. Using contour lines, describe the rise and fall of the land in Antarctica. (Lesson 5) 6. Which type of weathering is more likely to occur in Antarctica: ice wedging or root pry? Explain. (Lesson 9) 7. Chemical weathering occurs faster in warm, tropical climates, although it happens in cold climates as well. Describe some conditions in Antarctica that could lead to chemical weathering. (Lesson 9) 8. How might chemical weathering make it easy for mechanical weathering to occur? (Lesson 9) 9. Describe the porosity and permeability of Antarctic soil. (Lesson 13) 10. How does Antarctic soil differ from soil found in warmer, wetter climates? (Lesson 15)

Answer 1

4. The best use of a topographic map is to show elevation in man-made and natural features on Earth's surface. these maps are used for fishing, hiking, hunting, town planning, and surveying of land.

5. Around the perimeter of Antarctica, the land is at sea level. As you get further inland (especially towards the east), the elevation of the land grows due to mountainous and plateau areas.

6. An ice wedge is a narrow piece of ice causing a crack in the ground. It is more likely to occur in Antarctica than a root pry due to the large absence of tree, shrub, and plant roots in the area.

7. Some conditions in Antarctica that could lead to chemical weathering include frigid temperatures, iron oxides coating rock/acid rock drainage, and water soluble salts in soil.

8. Chemical weathering (the erosion of rocks caused by chemical reactions such as water and oxygen, etc.) may make it easier for mechanical weathering (break down of rocks into smaller pieces) due to chemicals such as water, oxygen, or minerals helping to break down the rock into smaller pieces.

9. Antarctic soil is of very poor quality due to low levels of porosity and permeability.

10. Soil in warmer and wetter climates have better quality due to higher levels of porosity and permeability.