Envi Sci 14.3 Quiz

increased population & demand

2 reasons most countries become severely deforested

killing invasive plants, planting native vegetation, & fencing areas to let them recover

3 ways to improve rangeland that has been degraded by overgrazing

extent of flooding, landslides, & erosion

From deforestation, what 3 things help the forest become allowed to regenerate or replanted

degraded

Much of the rangeland in the U.S. is public land managed by the federal government, which leases the rangeland to ranchers. However, much of the rangeland in the U.S. is

3.5

On average, each person in the United states uses about ___________ times the amount of wood used per person worldwide

the ecological service it provides

The condition of rural land is important because of

Rangeland

The land that supports different vegetation types like grasslands, shrublands, and deserts. This land is not used for farming or timber production

grazing of livestock (Cattle, sheep, goats, & native wildlife)

The most common human use of rangeland is for the

rain forests

The problem of deforestation is especially serious in

clear & selective cutting

The two most widely used methods of harvesting trees are

Public Rangelands Improvement Act (1978)

This ACT was enacted to improve land management practices by limiting herds to sizes that do not degrade the land in order TO REDUCE OVERGRAZING

Farmland

This land is used to grow crops and fruit. The U.S. contains more than 100 million hectares of this type of land

urban expansion is not a serious environmental problem

What about farmland is false?

farm, range, forest, parks, & wilderness

What are the 5 main categories of rural land?

replacing cows & sheep with exotic animals

What is not a common method for improving rangeland?

setting aside continuous tracts of land is expensive

What is not a reason to use wilderness corridors to help preserve wildlife habitat?

it was the first national park

What is one of Yellowstone's distinctions?

1,800

What is the WORLDWIDE average in cubic centimeters (cm3) of wood used per person each day

removal of CO2 from the air

What is the most important ecosystem service provided by forests?

any land protected from development & human impact

What phrase best defines wilderness according to the U.S. wilderness act of 1964?

urban development

What threatens some of the most productive farmland

D

Which of the following does not threaten protected public lands? A. overgrazing B. mining & logging C. trash & overuse D. none of the above

40

World population growth may require a __________ percent increase in the food production of rangeland from 1977 to 2030.

90

Worldwide, more than ____________ percent of all timber comes from unmanaged forests

Wilderness

a region that is not cultivated and that is not inhabited by humans

Tree farms

areas where trees are planted in rows and harvested like other crops.

1.5, firewood

About __________ billion people in developing countries depend on ________________ as their main source of fuel

less expensive

An advantage of clear-cutting

National Farmland Protection Program (NFPP)

In 1996, the U.S. government established this PROGRAM to help state, county, and local governments PROTECT FARMLAND in danger of being paved over or otherwise developed. The program was renewed in 2008.

severe overgrazing

In this type of overgrazing, all the vegetation that covers the land is eaten. Once the plants are gone, there is nothing to keep the soil from eroding

less desirable plants replacing more desirable ones

Overgrazing often results in changes in the plant community, such as:

mature trees

Selective cutting involves cutting

virgin, native, tree farms

The 3 categories of FOREST lands:

Native

forests that are planted and managed

Virgin

forests that have never been cut

Overgrazing

the depletion of vegetation due to the continuous feeding of too many animals

Deforestation

the process of clearing forests

Selective cutting

the process of cutting and removing only MIDDLE-AGED or MATURE trees. It is more expensive than clear-cutting, but is usually much less destructive. It is usually practiced on smaller areas owned by individuals

Clear-cutting

the process of removing all of the trees from an area of land. Using this type of cutting for large areas destroys wildlife habitat and causes soil erosion

Reforestation

the reestablishment and development of TREES in a FOREST land