Unit 6 Test

Question 1

Name a nonfeature of no-till agriculture

Answer 1

the land is not plowed

Question 2

name a biome that is well suited for modern intensive agriculture

Answer 2

temperate grassland

Question 3

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

Answer 3

overgrazing on public lands

Question 4

name a major cause of cultural eutrophication

Answer 4

fertilizer runoff

Question 5

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

Answer 5

sand

Question 6

name a nonexample of an ecosystem service

Answer 6

ozone depletion

Question 7

well water is often contaminated with which naturally occurring element

Answer 7

arsenic

Question 8

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

Answer 8

a positive feed back loop

Question 9

name a practice that is very damaging to species of coral

Answer 9

bottom trawling

Question 10

name a truth of modern intensive farming practices

Answer 10

they result in a decrease in species diversity

Question 11

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

Answer 11

the relative proportions of different particle sizes

Question 12

name an animal that is not very vulnerable to biomagnification

Answer 12

moose

Question 13

bycatch refers to what

Answer 13

organisms that are unintentionally caught while fishing

Question 14

in what order do you read a soil triangle diagram

Answer 14

clay, silt, sand

Question 15

a diet deficient in this nutrient may lead to goiter

Answer 15

iodine

Question 16

blindness may be caused by a diet deficient in the nutrient

Answer 16

vitamin A

Question 17

what natural process describes how a pest develops resistance to pesticide

Answer 17

natural selection takes place

Question 18

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

Answer 18

decreased need for chemical fertilizer

Question 19

what problem can best be addressed with contour plowing

Answer 19

soil erosion

Question 20

name a feature of integrated pest management

Answer 20

it makes use of the natural enemies of pests

Question 21

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

Answer 21

farmland is maintained permanently in a state of early succession

Question 22

irrigation of farmland refers to what

Answer 22

the artificial addition of water

Question 23

describe hydroponics

Answer 23

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

Question 24

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

Answer 24

WW2 and the present

Question 25

where is over nutrition most common today

Answer 25

in developed nations of Europe and north america

Question 26

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

Answer 26

A horizon

Question 27

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

Answer 27

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

Question 28

water logging is a result of what

Answer 28

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

Question 29

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

Answer 29

rotational grazing

Question 30

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

Answer 30

chesapeake bay

Question 31

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

Answer 31

terracing

Question 32

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

Answer 32

china

Question 33

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

Answer 33

the spread pest resistance to local weed populations

Question 34

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

Answer 34

land subsidence

Question 35

the greatest threat to food security is

Answer 35

poverty

Question 36

today over ___% of adults in the US are overweight

Answer 36

60

Question 37

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

Answer 37

kwashiorkor

Question 38

what is a cafo

Answer 38

confined animal feeding operation

Question 39

what are pops

Answer 39

persistent organic pollutants