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Flashcards in Unit 6 Test Deck (39)
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1
Q

Name a nonfeature of no-till agriculture

A

the land is not plowed

2
Q

name a biome that is well suited for modern intensive agriculture

A

temperate grassland

3
Q

which of the following is most similar to over fishing: mountaintop removal, malnutrition, slash and burn agriculture, overgrazing on public lands, water diversion

A

overgrazing on public lands

4
Q

name a major cause of cultural eutrophication

A

fertilizer runoff

5
Q

which of the following has the greatest permeability:silt, sand, humus, loam, clay

A

sand

6
Q

name a nonexample of an ecosystem service

A

ozone depletion

7
Q

well water is often contaminated with which naturally occurring element

A

arsenic

8
Q

as glacial ice melts, it exposes soil that absorbs more energy than ice, which causes it to get warmer, which melts more ice, exposing more soil, and on. This is an example of

A

a positive feed back loop

9
Q

name a practice that is very damaging to species of coral

A

bottom trawling

10
Q

name a truth of modern intensive farming practices

A

they result in a decrease in species diversity

11
Q

name a characteristic of soil that is used to determine soil texture

A

the relative proportions of different particle sizes

12
Q

name an animal that is not very vulnerable to biomagnification

A

moose

13
Q

bycatch refers to what

A

organisms that are unintentionally caught while fishing

14
Q

in what order do you read a soil triangle diagram

A

clay, silt, sand

15
Q

a diet deficient in this nutrient may lead to goiter

A

iodine

16
Q

blindness may be caused by a diet deficient in the nutrient

A

vitamin A

17
Q

what natural process describes how a pest develops resistance to pesticide

A

natural selection takes place

18
Q

crops genetically engineered to fix nitrogen would have which of the following advantages

A

decreased need for chemical fertilizer

19
Q

what problem can best be addressed with contour plowing

A

soil erosion

20
Q

name a feature of integrated pest management

A

it makes use of the natural enemies of pests

21
Q

the connection between farming and ecological succession is best exemplified by what

A

farmland is maintained permanently in a state of early succession

22
Q

irrigation of farmland refers to what

A

the artificial addition of water

23
Q

describe hydroponics

A

the growing of plants in a fertilized water solution on an artificial substrate

24
Q

the green revolution is most closely associated with the time period between

A

WW2 and the present

25
Q

where is over nutrition most common today

A

in developed nations of Europe and north america

26
Q

this layer of soil is also known as the topsoil, it contains much humus

A

A horizon

27
Q

the worlds supply of recoverable uranium ore is about 4.8 million metric tons. if the global consumption rate for uranium is 200 metric tons per day, about how many years will the uranium supply last

A

4.8 million /(365*200) = about 70 years

28
Q

water logging is a result of what

A

over irrigation by farmers to leach salts deeper into the soil and water accumulating underground and gradually raising the water table

29
Q

a preventative method to reduce the effects of cattle on rangeland is

A

rotational grazing

30
Q

the largest estuary in the US declared a “dead zone”, for which the federal government paid $250 million to farmers to leave the area around the estuary unplanted is

A

chesapeake bay

31
Q

producing staple crops, such as corn or rice, in hilly regions suffering from topsoil loss due to erosion would benefit most by using what agricultural practice

A

terracing

32
Q

which country is responsible for the majority of the globally produced farmed fish from aquaculture practices

A

china

33
Q

what statement best illustates a drawback to using GMO’s (genetically modified organisms) for food

A

the spread pest resistance to local weed populations

34
Q

the over withdrawal of groundwater from an aquifer may lead to land collapsing and can damage roadways, sewer lines, and building foundations. This is known as

A

land subsidence

35
Q

the greatest threat to food security is

A

poverty

36
Q

today over ___% of adults in the US are overweight

A

60

37
Q

a nutritional disorder in children causing orange hair an d bloated bellies is called

A

kwashiorkor

38
Q

what is a cafo

A

confined animal feeding operation

39
Q

what are pops

A

persistent organic pollutants