ENV 101 Exam 2

Question 1

As a result of humans' increased use of the water in the Colorado River, _________

Accepted Answer

fisheries in the upper Gulf of California have been hurt

Question 2

Plants contribute to the water cycle through the process of what?

Accepted Answer

Transpiration

Question 3

Subsidence and sinkholes can occur when ________.

Accepted Answer

excessive water use lowers water table & weakens substrate

Question 4

All of the following practices are used to control soil erosion EXCEPT __________.

Accepted Answer

industrial monoculture

Question 5

In a La Nina year on the west coast, upwellings are?

Accepted Answer

Stronger

Question 6

The Conservation Reserve Program pays farmers to ________.

Accepted Answer

stop cultivating highly erodible land

Question 7

Which of the following are farms that raise large numbers of the same animal in a small area?

Accepted Answer

feedlots

Question 8

The most prevalent threats to the Colorado River are?

Accepted Answer

Invasive Species and Water Development

Question 9

Raising ________ requires the most land and water.

Accepted Answer

beef cattle

Question 10

benefit of downwelling is?

Accepted Answer

Provides oxygen to for deep water life

Question 11

Organic agriculture implies farming techniques that use NO __________.

Accepted Answer

synthetic pesticides

Question 12

About 100 years ago, agricultural production in the United States tripled due to __________.

Accepted Answer

the invention of fertilizers and use of more modern machinery

Question 13

Which is NOT a reason why areas of AZ have higher water use than many other parts of the US?

Accepted Answer

most Arizonians have to haul their own water

Question 14

A ____ is an area where freshwater converges & ultimately drains into the largest body of water

Accepted Answer

Watershed

Question 15

Which statement most accurately describes the population control efforts in China?

Accepted Answer

a one-child policy that is enforced through taxation and penalties.

Question 16

What is the equation for the IPAT Model?

Accepted Answer

Impact = Population x Affluence x Technology

Question 17

Dams create a __________ from which we can get water for human use.

Accepted Answer

reservoir

Question 18

What is the maximum population size that a given environment can sustain?

Accepted Answer

Carrying capacity

Question 19

What is a benefit to dams?

Accepted Answer

Greater supply of water

Question 20

Which of the following agricultural systems would be most susceptible to diseases or pests?

Accepted Answer

monocultures

Question 21

When birth rates decline, what happens to a given population?

Accepted Answer

The average age of the population grows older

Question 22

If you dug down in the soil and hit water, what have you just reached?

Accepted Answer

Zone of saturation

Question 23

Which of the following is not one of the top 4 genetically modified crops?

Accepted Answer

coffee

Question 24

Most water taken out of the natural world is used for __________.

Accepted Answer

irrigation for agriculture

Question 25

A serious problem that results from excessive water withdrawn from aquifers is that ________

Accepted Answer

the soils are compacted & the size of the aquifer is reduced

Question 26

What is the status of GM products in the United States?

Accepted Answer

GM crops are in many foods sold in the US.

Question 27

Terracing, contour farming, intercropping, and crop rotation all ________.

Accepted Answer

are techniques for conserving soil resources and fertility

Question 28

Most freshwater is contained in

Accepted Answer

Ice

Question 29

The process of soil quality declining in productivity is called __________.

Accepted Answer

soil degradation

Question 30

integrating biocontrol, crop rotation, & alternative tillage methods, are examples of ________.

Accepted Answer

integrated pest management

Question 31

A consumptive use of the Colorado River is _______.

Accepted Answer

stock watering

Question 32

What is the world’s most populous nation?

Accepted Answer

China

Question 33

Over-irrigation can result in ________.

Accepted Answer

waterlogging

Question 34

Moving surface water from one place to another is __________.

Accepted Answer

diversion

Question 35

Native fish in the Colorado River are?

Accepted Answer

Adapted for warm and silty water

Question 36

Until about 10,000 years ago, our species depended on ________.

Accepted Answer

hunting and gathering

Question 37

Rivers carry ________, which affect the ocean's salinity.

Accepted Answer

sediments

Question 38

We lose 5 to 7 million HA of productive cropland per year to ________.

Accepted Answer

erosion, over-irrigation, and overgrazing

Question 39

The technology used to remove salt from salt water is?

Accepted Answer

Desalination

Question 40

Over time, pesticides become less effective. This is because __________.

Accepted Answer

pests can become resistant to pesticides over time

Question 41

TFR stands for what?

Accepted Answer

Total Fertility Rate

Question 42

What is NOT true of the Colorado River?

Accepted Answer

Mexico did not have rights to water from the River

Question 43

A negative consequence of over-fertilizing includes ________.

Accepted Answer

eutrophication and dead zones in nearby aquatic ecosystems

Question 44

What ecosystem service is provided by wetlands?

Accepted Answer

All of the above

Question 45

The law of prior appropriation refers to?

Accepted Answer

Granting water to whom uses it first

ENV 101 Exam 2

Questions 45

ENV 101 Exam 2

Questions 45