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Explain the difference between point and nonpoint. Which is harder?
- point source is coming from a specific known source
- non point source is when there is no specific source (non point is harder to control because we dont know where the pollution is coming from)
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What are national parks controversial?
- people feed the animals
- this creates a change in animal behavior
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Distinguish between acute and chronic toxicity?
- acute is immediate (affects humans)
- chronic is over time
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Describe 2 of the 6 components of soil?
air, water, dead organic material, soil, fauna and floral, clay
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Describe two ways to decrease air pollution
contorl nitrates and phosphates
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What is environmental health?
natural, social, cultural, and biological
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What are the two natural causes of climate shift?
- El Nino & Maloncovitch
- tilt of the earth
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Define "emergent disease"
- a new disease that was not previously known to science
- it can also be a disease that was gone for 20 yrs. or more
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Name two pieces of evidence for human induced climate change
- carbon in the ice in antartica
- change in seasons
- temperatures getting warmer
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What are the five layers of soil?
- O A B E C layers
- O is organic
- A is the surface
- B is the subsoil
- E is leviated
- C is decomposed layers
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Primary, Secondary, and Tertiary Water Treatments
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What is the difference between a primary air pollutant and a secondary air pollutant?
- primary air pollutant are bas as soon as they are released
- secondary air pollutant can become bad
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Name two ways to minimize the environmental costs of farming?
- organic farming
- control where the waste goes
- genetically modified crops, sustainable (controlled), strip farming
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Define the term "health"
social, mental, physical well being
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Define "disease"
abnormal change in the body's functions
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What is the green house effect?
- gas in the atmosphere, collects heat
- capture of energy/heat by gases in the atmosphere
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Why is road construction a threat to global forests?
- damages roads to make roads
- others go and have full access
- people come in and destroy the habitat
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What are endocrine distruptors ans why are they of concern?
- the endocrine systems produces hormones
- excess changes in sex ex: fish
- even in small concentrations they have bad affects(women pee and it goes into the water)
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Name three alternatives to clear cutting forests
- sheerwood harversting: go in and cut down certain trees every 10 yrs or so
- strip cutting: lines, stripping
- selective: largest trees or varieties
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Name 4 ways that water is important to life?
transports nutrients, density between solids/liquids, dissolves nutrients
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Define "bioaccumulation" and "biomagnification"
- bioaccumulation: cells from a body absorb and take nutrinents from the environment (storage)
- biomagnification: moves its way up the food chain (DET) larger fish accunulates to eagles at the top of the chain(it stays in cells and magnifies)
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What do wwe mean by old growth forest?
a forest where the trees are undisturbed by humans and they get to their full growth cycle
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Give one example of non-point source watter pollution
- no specific point
- farm pesticides
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What is the most vulnerable part of the Earth? Why?
Atmosphere
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Define the tem oxygen sag
there is an oxygen decline from the bacteria breaking down nutrients and taking the oxygen
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Why does hunger persist in a wordl of surplus food production?
- war and other political issues
- the food is not evenly distributed
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Describe two environmental costs of farming?
- irrigation (water)
- pesticides use
- pollution, water logging, salination
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What is the green revolution?
when the government helps farmers grow high-yield crops
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Give one example of point source pollution
factory- it is known where its coming from
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Name 2 emergent properties of forests that are valuable to humans
- anythings that make forests better
- nutrients, shelter, food, oxygen
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Define Eutrophic
water rich in nutrients and organic material
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Why is overgrazing such a problem?
- grasslands
- taking habitat destruction
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Describe an example of environmental cost of water diversity by taking the water from the river to farms and cities
- less water in the rivers which may cause them to dry out
- need to remove people(relocation)
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Define "Oligotrophic"
water low in wild life (clear)
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Withdrawal is the total amount of water...
B) taken from rivers, lakes, acquifers
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Economically, was is monoculture better for loggers?
A) largest benefit due to one type of forest
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Goiter is a common disease resulting from a dietary shortage from
B) Iodine
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Disadvantage of conservation tillage methods?
C) increased pests and weeds
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EPA assumes acceptable risk for environmental hazard is about 1 in ?
E) 1 million
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What factor is important to decide if a country is water "rich" or "poor"?
E) renewable water supplies
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Monetary inputs to local environment thru parks is called what?
A) ecotrourism
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Forests harvest method leave natural old growth forets?
B) selective
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NOT ON TEST: Most public rangelands are in poor condition due to what?
C) too many privately owned animals on public lands
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One principle way lakes suffer from acid deposition?
B) fish eggs due to fish population fare
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What is the layer of soil that is a mixture of minerals?
A) O layer (organic)
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Biomagnification of DDT
A) higher ----level organism "inverse biological pyramid"
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Hydrologic compartment that contains the greatest amount of fresh water is...
D) ice and water
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Soil organism usually stays ___________ the soil
C) close to the surface
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What is the basis of the statement that we can feed more people if we feed it to the people rather than feeding it to livestock?
B) Second Law of Thermodynamics
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Most commom, loggers prefer "clear cut" logging because...
C) it is the most efficient, cheap, fast machinery
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Sustainable farming is...
A) cheaper and safer than conventional farming
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What are the advantages of genetically modified crops?
E) all resist drought and often even resist pests
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High persistance of toxic chemical
netan toxicity
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Colifrorm bacteria populationg are routinely monitored in drinking water supplies because bacteria...
C) indicate the precense of feces in water
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Principal problems that resusted from the construction of large dome include...
- E) all
- evaporation, salination, leaking, weakening,
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National Parks are important
endanger, pollution
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What are the greastest threat to humans?
Pathogenic Organisms
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Plants that take up heavy metals found in water are an example of what?
Bioremediation
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Atmospheric zone where events occur is what?
troposhere
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Activity shore of
flushing toilet
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What is not found in water than has gone thru the tertiary treatment?
dissolved minerals
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Famines are most often serious when
drought and war
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What are the three crops that humans rely on for majority nutrients and
wheat, rice, and maize
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type of ----susceptible to acid
limestone
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The parent material layer of soil is composed of what?
rock fragments
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Cutting of rainforests. Which statement is how rainforest and tied to human mobility?
mosquitoes with an aquatic form spread many hgihly contagious disesases
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