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EHST 2110 ECU EXAM 3 QUESTIONS AND ANSWERS
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EHST 2110 ECU EXAM 3 QUESTIONS AND ANSWERS
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Name: Score:199 Multiple choice questions
Term 1 of 199
EPA mandated reductions in sulfur content of diesel fuel from ___________ in 2004 to ________ in 2010
3,400 ppm; 15 ppm
1,500 ppm; 30 ppm
4,500 ppm; 25 ppm
2,000 ppm; 50 ppm
Term 2 of 199
What happens when asbestos is coupled with cigarette smoking?
60 times more likely to get lung cancer; especially harmful
30 times less likely to get lung cancer; generally safe
no effect on lung cancer risk; completely unrelated
10 times more likely to get skin cancer; mildly harmful
,Term 3 of 199
Organic mercury
more toxic than inorganic mercury. Extremely soluble, can penetrate membranes, attach
to blood cells and diffuse to the brain destroying coordination
- skin and respiratory inflammation
- suspected carcinogen
- contained in plywood, floor coverings, and textiles
- causes rashes, respiratory inflammation, headaches, dizziness, lethargy
Chelation - process by which a drug is given that binds to lead, sequestering the metal
and facilitating excretion from the body. damage cannot be reversed and not a one time
treatment
Precipitation measuring less than 5.0 on the pH scale. Formed when major precursors
(SO2 and NOx) are chemically converted through a series of reactions changing it to
nitric and sulfuric acids.
Term 4 of 199
What is the composition of the atmosphere?
2010-2020, 40 years after peak production in the 1970's
78% Nitrogen
21% Oxygen
0.9% Argon
0.03% Carbon Dioxide
18 million metric tons of SO2 (same as all US annual emissions)
- Shifting rainfall patterns
- Extreme weather events more common
- Rising Sea Levels
- Diminishing crop yields due to hotter drier weather
- Loss of Biodiversity
- Human illness (topical diseases)
,Term 5 of 199
What're some examples of Greenhouse Gases?
All poisons are toxic, but not all toxins are poisonous
- Encapsulation
- Enclosure
- Removal
- Methane
- Nitrus Oxide
- Halocarbons
- Water Vapor
1. Hazard Identification
2. Dose-response assessment
3. Exposure assessment
4. Risk Characterization
Term 6 of 199
Whats an example of discharge of PCB wastes from factories into waterways?
Infrared Radiation
Selling Concept
General Electric
Ford
Term 7 of 199
An ecosystems vulnerability to acid rain is determined primarily by the composition of the soil
and bedrock, an attribute referred to as the _____________ ___________
Nutrient absorption level
Soil erosion rate
Buffering capacity
Water retention ability
, Term 8 of 199
PCB effects on Humans
Liver disorders, miscarriage, low birth weight, abnormal multiplication of cells in test
animals
-Acne like skin disorder called chloracne
-Possible liver disorder
-No link to causing cancer
combining information from 1-3 and production of a comprehensive picture of types of
adverse health effects likely to occur (frequency, duration)
8-30 miles above Earth; site of ozone layer; temperature slowly rises with increasing
altitude
Term 9 of 199
What are the "margins of safety" with regards to toxic substances
drinking water, food additives, pesticide residue, air pollution
- buffer zone
- lab testing measure concentration levels
Sulfur Dioxide (SO2) and Nitrogen Oxides (NOx)
1. Hazard Identification
2. Dose-response assessment
3. Exposure assessment
4. Risk Characterization
Term 10 of 199
Who discovered Acid Deposition?
discovered in the 20th century by american chemist john doe
observed in coal burning factories as early as the 19th century, by English chemist
Robert Angus Smith
first identified in the 18th century by french chemist marie curie
studied in the 21st century by japanese chemist hiroshi tanaka
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