AMU SCIN 140 Quiz 3 - Lessons 5&6 Answered

Part 1 of 1 - 100.0/ 100.0 Points Question 1 of 10 10.0/ 10.0 Points Which of the following mining processes removes the top layers of soil, rock, and vegetation to access minerals?  A. Acid mine drainage  B. Subsurface mining  C. Smelting  D. Surface mining Answer Key: D Feedback: Surface mining removes surface vegetation, rocks, and soil to create an open pit for mining. Subsurface mining uses vertical or sloping shafts to access minerals deep underground. Smelting melts ore to separate valuable minerals from impurities. Acid mine drainage occurs when acidic pollution from mining drains into nearby water sources. Source: Lesson 5, Classroom Question 2 of 10 10.0/ 10.0 Points Which of the following soil conservation issues occurs due to improper irrigation increasing the soil’s salinity?  A. Contour plowing  B. Desertification This study source was downloaded by from CourseH on :50:11 GMT -06:00 This study resource was shared via CourseH  C. Soil salinization  D. Soil erosion Answer Key: C Feedback: Soil salinization occurs when repeated irrigation and poor drainage increase the salinity of the soil. Soil erosion occurs when wind or rain remove soil from the land. Desertification occurs when wind and drought cause ecosystems to become barren deserts. Contour plowing helps conserve soil by plowing along the natural contours of the land. Source: Lesson 5, Classroom Question 3 of 10 10.0/ 10.0 Points Which of the following federal organizations oversees national parks?