Modern Agriculture: Changing Landscapes Answers

Analyze the image below and answer the question that follows. The arrows in the image above show cause and effect. Which of the models depicts an accurate cause-and-effect relationship? A. Model A B. Model B C. Model C D. Model D Please select the best answer from the choices provided.

Which of the following statements about topsoil is false? A. Topsoil forms very slowly. B. Topsoil is full of nutrients and good for farming. C. Topsoil can be found only on farmland. D. Human activities can accelerate the erosion of topsoil. Please select the best answer from the choices provided.

Overgrazing, overfarming, and the diversion of water for irrigation are significant causes of __________. A. deforestation B. desertification C. decreased agricultural production D. shifting cultivation Please select the best answer from the choices provided.

Analyze the map below and answer the question that follows. Image courtesy of the USDA Part of China is circled in black on the map above. Based on the map key, why is southeastern China not at risk of desertification? A. Southeastern China is colored in grey, which means it already is a desert. B. Southeastern China is colored in blue, which means it is cold year-round. C. Southeastern China is colored in green, which means it has a humid climate that regulates environmental and ecological changes, preventing desertification. D. Southeastern China is colored in white, which means it is mostly ice year-round; icy climates have so much rain that it’s impossible for the land to become dry. Please select the best answer from the choices provided.

High erosion rates in Madagascar are caused primarily by __________. A. poor economic growth and high poverty rates B. the government’s failure to pass laws restricting logging C. the reduced use of shifting cultivation D. decreased desertification Please select the best answer from the choices provided.

Which of the following situations is not an example of natural erosion? A. Winds hollow out rocks in Moab, Utah. B. Agriculture in Nebraska changes the local landscape. C. The Pacific Ocean erodes the west coastline of California. D. The Nile River creates the Nile Delta where it meets the Mediterranean Sea. Please select the best answer from the choices provided.

Which of the following statements best describes what is occurring in the land surrounding the Sahara Desert? A. Desertification is increasing, and the desert is expanding. B. Fewer people are trying to farm in this semiarid region. C. The desert is shrinking with the increased use of irrigation. D. Increased urbanization has resulted in decreased deforestation. Please select the best answer from the choices provided.

Most of the eastern United States is humid. How does the humidity on the East Coast prevent desertification? A. Humidity is the number-one cause of desertification. B. No part of the United States is safe from desertification. C. Humidity leads to increased soil salinity, which causes desertification. D. The East Coast's humidity is directly related to the number of trees that restore moisture to the air and allow for soil preservation. Please select the best answer from the choices provided.

Foreign logging companies have increased operations in eastern Russia because they are able to use cheaper labor and reduce costs. Several animals’ habitats are threatened by this activity. Which of the following is a negative result of this deforestation? A. The Siberian tiger is losing its habitat. B. The companies are replacing the logged trees. C. The loggers want to find more locations to work cheaply. D. Russia is trying to make work easier by improving snow-removal methods. Please select the best answer from the choices provided.

One of the results of the 2010 Gulf of Mexico oil spill is the threat to various species in the gulf’s ecosystem; it disturbed and, in some cases, forever altered the __________ of the Gulf Coast. A. biodiversity B. agriculture C. deforestation D. desertification Please select the best answer from the choices provided.