Exam (elaborations)
IB ESS: Pollution Management questions well answered already passed
- Course
- Institution
IB ESS: Pollution Management questions well answered already passed
[Show more]
Content preview
IB ESS: Pollution ManagementPollution - correct answer ✔✔The addition of a substance or agent to an environment by human activity
at a harmful rate which affects the organisms within the environment
Point source pollution - correct answer ✔✔The release of pollutants from a single, clearly identifiable
source (factory chimney)
Non-point source pollution - correct answer ✔✔The release of pollutants from numerous, widely
dispersed origins (gases from the exhaust systems of vehicles)
Major sources of pollutants - correct answer ✔✔Combustion of fossil fuels, domestic and industrial
waste, manufacturing and agricultural systems
Describe two direct methods of monitoring pollution - correct answer ✔✔One method for air and one
for soil or water
air pollution:
-measure the acidity of rain water to determine levels of
-measure CO2, CO, or NOx levels in the atmosphere using a gas sensor
-measure particulate matter suspended in the atmosphere
soil pollution:
-conduct tests for nitrates and phosphates
-measure the level of organic matter in the soil
water pollution:
-nitrate and phosphate tests
-fecal coliform tests
-tests for heavy metals
, Biochemical oxygen demand - correct answer ✔✔Biochemical oxygen demand (BOD) is the amount of
oxygen required to support respiration by organisms living in a water sample.
high BOD indicates there are many organisms using oxygen for respiration, low BOD indicates relatively
few organisms needing oxygen for respiration
high BOD = low DO levels = high pollutant levels, especially nitrate & phosphate
low BOD = high DO levels = low pollutant levels
Outline approaches to pollution management. - correct answer ✔✔3-tiered approach to pollution
management- "replace, regulate, and restore" model
-change the human activity that generates the pollutant in the first place
-minimize the amount of the pollutant released into the environment
-clean up the pollutant and the affected areas
Evaluate the costs and benefits to society of the World Health Organization's ban on the use of the
pesticide DDT. - correct answer ✔✔Costs: mosquitoes have developed resistance to DDT, human health
concerns from exposure, loss of biodiversity
Benefits: kills mosquitoes which spread malaria, so malaria rates decrease, cheap, persistent (lasts a long
time), effective
Processes of eutrophication - correct answer ✔✔-increase of nitrates and phosphates leading to rapid
growth of algae
-accumulation of dead organic matter
-high rate of decomposition and lack of oxygen
Positive feedback processes.
Impacts of eutrophication - correct answer ✔✔-death of aerobic organisms
-collapse of food chains and loss of species diversity
-water contaminated with nitrites
Pollution management strategies for eutrophication - correct answer ✔✔Minimize the amount of
nutrients being released into the system by:
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now