Question 1

The most common cause of desertification of grasslands is_________________.

Accepted Answer

A) climate change 
B) plowing too often 
C) depletion of aquifers 
D) overgrazing 
E) leaving them fallow 
A) climate change 
B) plowing too often 
C) depletion of aquifers 
D) overgrazing 
E) leaving them fallow D

Question 2

What is an outcome of holistic planned grazing?

Accepted Answer

A) Keeping animals bunched for a set period of time ensures that all plants are grazed evenly,even weeds. 
B) It maximizes productivity. 
C) It helps keep plant biomass levels in an ideal range,which maximizes productivity. 
D) It makes ranching profitable again. 
E) All of these answers are correct. 
A) Keeping animals bunched for a set period of time ensures that all plants are grazed evenly,even weeds. 
B) It maximizes productivity. 
C) It helps keep plant biomass levels in an ideal range,which maximizes productivity. 
D) It makes ranching profitable again. 
E) All of these answers are correct. E

Question 3

Match each term in the left-hand column to the statement that it best exemplifies.

Accepted Answer

Linked Questions Science Literacy Use the following graphic to answer the next four questions.

Question 4

Human activity has caused the degradation of grasslands.How has grassland degradation in turn affected humans?

Accepted Answer

Grassland degradation has resulted in a

Question 5

What are some of the natural and human threats that grasslands currently face?

Accepted Answer

Grasslands are being threatene

Question 6

You have been employed by a seed company to genetically modify a high-yielding wheat variety so it is resistant to the most common types of wheat diseases.Why and how could grasslands be important in your research?

Accepted Answer

Most cereal crops,including wheat,were o

Question 7

Jill wants to do something to help prevent soil erosion on the ranch.You recommend a(n)__________________.

Accepted Answer

A) adaptive management program 
B) conservation easement 
C) conservation reserve program 
D) shelterbelt 
A) adaptive management program 
B) conservation easement 
C) conservation reserve program 
D) shelterbelt

Question 8

Grassland that are MOST susceptible to desertification are found in ____________ areas.

Accepted Answer

A) humid 
B) arid 
C) cold 
D) boreal 
E) tropical 
A) humid 
B) arid 
C) cold 
D) boreal 
E) tropical

Question 9

The R horizon ___________________.

Accepted Answer

A) is solid,unbroken rock 
B) contains decaying and organic material 
C) is less fertile but higher in mineral content 
D) contains mostly surface litter 
E) is the rock that is in the process of being weathered or broken up 
A) is solid,unbroken rock 
B) contains decaying and organic material 
C) is less fertile but higher in mineral content 
D) contains mostly surface litter 
E) is the rock that is in the process of being weathered or broken up

Question 10

Why did the British government cull thousands of wild herds in Zimbabwe in the 1950s?

Accepted Answer

A) They were annoying the villagers. 
B) More land needed to be created for ranching. 
C) They were needed as a source of meat in the markets. 
D) They were eating too much grass. 
E) They were damaging the land. 
A) They were annoying the villagers. 
B) More land needed to be created for ranching. 
C) They were needed as a source of meat in the markets. 
D) They were eating too much grass. 
E) They were damaging the land.

Question 11

The animal farming technique known as __________________ allows animals to graze on one small section of a pasture for a few days before being moved to another section for grazing.

Accepted Answer

A) rotational grazing 
B) terracing 
C) planned grazing 
D) numerical limits grazing 
A) rotational grazing 
B) terracing 
C) planned grazing 
D) numerical limits grazing

Question 12

One of the advantages of using land for grazing is __________________.

Accepted Answer

A) it takes less land per animal than feeding grain to livestock 
B) we are turning material we cannot eat into food that we can eat 
C) that plants are eaten faster than they can grow 
D) that the soil becomes compacted,making it harder for seeds to germinate 
E) All of these answers are advantages for using land for grazing. 
A) it takes less land per animal than feeding grain to livestock 
B) we are turning material we cannot eat into food that we can eat 
C) that plants are eaten faster than they can grow 
D) that the soil becomes compacted,making it harder for seeds to germinate 
E) All of these answers are advantages for using land for grazing.

Question 13

Jill,the head rancher,tells you to move most of the cattle off a certain pasture.She says by grazing fewer cattle,the grass will grow thicker and recover more quickly.When she asks what you think,you tell her that __________________.

Accepted Answer

A) the cattle will eat the weeds and leave more room for the grasses,so she should put even more cattle in the pasture 
B) the soil erosion will speed up without as many cattle to churn up the topsoil 
C) it will increase competition between weeds and grasses,since the cattle will eat only the sweet grass and leave the weeds,then the weeds will take over 
D) she should get rid of the cattle and raise chickens,which eat grain and will allow the grass to grow back 
A) the cattle will eat the weeds and leave more room for the grasses,so she should put even more cattle in the pasture 
B) the soil erosion will speed up without as many cattle to churn up the topsoil 
C) it will increase competition between weeds and grasses,since the cattle will eat only the sweet grass and leave the weeds,then the weeds will take over 
D) she should get rid of the cattle and raise chickens,which eat grain and will allow the grass to grow back

Question 14

How do the grazing patterns of wild herbivores make the lands healthier than those grazed by cattle?

Accepted Answer

Wild herbivores graze in tightly bunched

Question 15

"Grassland systems are a rich source of one of the ecosystem's goods and services: genetic resources." Explain why this statement is TRUE.

Accepted Answer

While grasslands are a rich source of fo

Question 16

Humans rely upon grasslands to graze domestic livestock.How would degradation of grasslands impact grazing,and what affect would this have on humans?

Accepted Answer

Globally,3 billion domestic livestock,in

Question 17

Livestock ranchers often reach legal agreements with governments that permit them to use an area of land in a defined manner.These agreements are known as _____________________.

Accepted Answer

A) reserves 
B) shelter belts 
C) rotational grazing permits 
D) conservation easements 
A) reserves 
B) shelter belts 
C) rotational grazing permits 
D) conservation easements

Question 18

Soil erosion in grasslands is a direct result of _____________.

Accepted Answer

A) urbanization and soil compaction 
B) soil compaction and energy production 
C) plant loss and urbanization 
D) plant loss and soil compaction 
E) plant loss and energy production 
A) urbanization and soil compaction 
B) soil compaction and energy production 
C) plant loss and urbanization 
D) plant loss and soil compaction 
E) plant loss and energy production

Question 19

One modern farming technique is to give livestock antibiotics to prevent infection and promote growth.These antibiotics are excreted in the fecal matter of the animals and are still active.What is the consequence of this practice on soil?

Accepted Answer

Since the antibiotics are still active i

Question 20

Which of the following statements are correct?

Accepted Answer

A) Grasslands are not found in Antarctica. 
B) Grasslands are found on every continent. 
C) Grasslands vary based on climate. 
D) Grasslands are not found in Antarctica and they vary based on climate. 
E) Grasslands are found on every continent and they vary based on climate. 
A) Grasslands are not found in Antarctica. 
B) Grasslands are found on every continent. 
C) Grasslands vary based on climate. 
D) Grasslands are not found in Antarctica and they vary based on climate. 
E) Grasslands are found on every continent and they vary based on climate.

Exam 20: soil Resources and Grasslands Restoring the Range

The most common cause of desertification of grasslands is_________________.

What is an outcome of holistic planned grazing?

Match each term in the left-hand column to the statement that it best exemplifies.

Human activity has caused the degradation of grasslands.How has grassland degradation in turn affected humans?

What are some of the natural and human threats that grasslands currently face?

You have been employed by a seed company to genetically modify a high-yielding wheat variety so it is resistant to the most common types of wheat diseases.Why and how could grasslands be important in your research?

Jill wants to do something to help prevent soil erosion on the ranch.You recommend a(n)__________________.

Grassland that are MOST susceptible to desertification are found in ____________ areas.

The R horizon ___________________.

Why did the British government cull thousands of wild herds in Zimbabwe in the 1950s?

The animal farming technique known as __________________ allows animals to graze on one small section of a pasture for a few days before being moved to another section for grazing.

One of the advantages of using land for grazing is __________________.

Jill,the head rancher,tells you to move most of the cattle off a certain pasture.She says by grazing fewer cattle,the grass will grow thicker and recover more quickly.When she asks what you think,you tell her that __________________.

How do the grazing patterns of wild herbivores make the lands healthier than those grazed by cattle?

"Grassland systems are a rich source of one of the ecosystem's goods and services: genetic resources." Explain why this statement is TRUE.

Humans rely upon grasslands to graze domestic livestock.How would degradation of grasslands impact grazing,and what affect would this have on humans?

Livestock ranchers often reach legal agreements with governments that permit them to use an area of land in a defined manner.These agreements are known as _____________________.

Soil erosion in grasslands is a direct result of _____________.

One modern farming technique is to give livestock antibiotics to prevent infection and promote growth.These antibiotics are excreted in the fecal matter of the animals and are still active.What is the consequence of this practice on soil?

Which of the following statements are correct?

environmental Literacy and Sustainability Lessons From a Vanished Society

Science Literacy and the Process of Science Fungal Attacker Threatens North American Bats

Information Literacy and Toxicology Lead in the Water

Ecosystems and Nutrient Cycling Engineering Earth

Population Ecology Gray Wolves Return to Yellowstone

Community Ecology the Florida Everglades: a Community in Cris

evolution and Extinction a Tropical Murder Mystery

Biodiversity Palm Oil Plantations Threaten Tropical Forests

Preserving Biodiversity a Forest Without Elephants

Human Populations the Kerala Model

Urbanization and Sustainable Communities Creating Green Cities

Environmental Health Eradicating a Parasitic Nightmare

ecological Economics and Consumption Wall to Wall, Cradle to Cradle

environmental Policy the World Tackles Ozone Depletion

managing Solid Waste a Plastic Surf

Freshwater Resources Toilet to Tap

Water Pollution Suffocating the Gulf

marine Ecosystems Ocean Acidification: the Other Co2 Problem

Forests Returning Trees to Haiti

Mineral Resources No Stone Unturned

Feeding the World a Gene Revolution

sustainable Agriculture: Raising Crops Farming Like an Ecosystem

Agriculture: Raising Livestock Can Meat Be Part of a Healthy, Environmentally Conscious Diet

Fisheries and Aquaculture Fish in a Warehouse

coal Bringing Down the Mountain

Oil and Natural Gas the Bakken Oil Boom

Air Pollution the Youngest Scientists

global Climate Change Climate Refugees

Nuclear Power the Future of Fukushima

Sun, Wind, Water, and Earth Energy Fueled by the Sun

Biofuels Gas From Grass

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