Modern Agriculture: Changing Landscapes

Question 1

How many species are lost to extinction each day as a result of deforestation? A. 10 B. 100 C. 1,000 D. 10,000 Please select the best answer from the choices provided.

Revolt · Accepted Answer

B

Question 2

Which of the following is not a negative effect of erosion? A. landslides B. increased flooding C. threats to biodiversity D. limited deforestation Please select the best answer from the choices provided.

Revolt · Accepted Answer

D

Question 3

Human activity accelerates erosion to 10 to 15 times its natural rate. What are some practices that humans can adopt to slow down erosion?

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Since human activities like agricultural cultivation, overgrazing, urban sprawl, and deforestation accelerate the natural erosion process, limiting these activities should slow down the erosion process. Alternatives include new planting techniques, limits on deforestation, government protection of vulnerable land (e.g. declaring certain regions as nature preserves, national parks, or protected land to limit development), and the expansion of the endangered species list to protect biodiversity.

Question 4

Which of the following activities is not a cause of desertification? A. overgrazing B. overfarming C. conserving water D. diverting water Please select the best answer from the choices provided.

Revolt · Accepted Answer

C

Question 5

The Old Man in the Mountain is a geological formation in the White Mountains of New Hampshire. Which of the following statements best describes the effects of natural erosion on this formation? A. Man-made supports and wires were able to prevent the erosion of the formation, and it is still viewable today. B. Natural erosion caused the formation to collapse despite people's efforts to save it. C. Natural erosion did not affect this formation; its collapse was a result of man-made erosion. D. Natural erosion is more powerful than man-made erosion. Please select the best answer from the choices provided.

Revolt · Accepted Answer

B

Question 6

How does increased soil salinity contribute to desertification?

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Soil salinity is an effect of irrigation. Increased soil salinity makes the soil hostile to plant growth by limiting the soil’s ability to absorb water. The soil then turns dry, leading to desertification.

Question 7

Which of the following terms describes the millions of types of plants, animals, and microorganisms on Earth? A. ecosystem B. climate C. biodiversity D. habitat Please select the best answer from the choices provided.

Revolt · Accepted Answer

C

Question 8

The Dust Bowl that occurred in America in the 1930s is a dramatic example of erosion caused by __________. A. deforestation B. overgrazing C. climate change D. agricultural cultivation Please select the best answer from the choices provided.

Revolt · Accepted Answer

D

Question 9

Explain the difference between deforestation, desertification, and damming.

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Deforestation is the clearing of trees from land desired for the development of society. Desertification is the changing of arable or habitable land into a desert due to intense climate change or destructive land use, such as that which occurs with certain agriculture methods. Damming is placing a man-made barrier in the way of the flow of a natural waterway to control its movement and uses.

Question 10

How have deforestation, desertification, and damming negatively affected the environment?

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Negative effects of damming include decreased fish populations, the loss of river biodiversity, the loss of sediment traveling downriver, and increased flood severity. The process of desertification causes soil to become unusable. Deforestation can contribute to decreased biodiversity and to climate change.

Modern Agriculture: Changing Landscapes Answers

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