Human Impact
When excess carbon dioxide from burning of fossil fuels in the atmosphere mixes with water
What is acid precipitation
What is a chemical that causes eggshells in birds to be thin
What is DDT
What is optimum amount?
When something can be broken down by bacteria
What is biodegradable
A technology used by industry to remove SO2 gases from their emissions.
What is a scrubber.
Two items that water conservationists would test for to determine water quality.
What is acidity, dissolved oxygen, heavy metals, pesticides, salts, plant nutrients (nitrogen, phosphorus)
What other factors, besides the pollution source, will affect the oxygen content of the water?
Turbulence (stirring) and temperature.
The following are LD50 amounts for 2 chemicals. Which one of these is the MOST toxic?
Subtance A: 50 mg/kg
Subtance B: 0.05 mg/kg
Substance B because LESS of it is required to kill half the population.
The use of clay in landfills prevents this from happening
What is leaching
The concentration of hydrogen ions in the solution
Organisms that are sensitive to changes in water ecosystems.
What is a bioindicator species
Name two of the four types of organic molecules.
What is carbohydrates, lipids, proteins (amino acids), nucleic acids (DNA, RNA).
What would be more toxic 25 ppm or 25 ppb of DDT in the water?
What is 25ppm
Using bacteria to clean up oil spills
What is bioremediation
Limestone (calcium carbonate) sometimes added to acidic lakes. What is the effect?
To neutralize the water.
Term to describe the accumulation of toxic pollutants through the food chain in water.
What is biomagnification
What type of organic molecule is sugar
carbohydrate
A non-point source of pollution
Pollution that you cannot trace it's origin to a single point
CFCs destroyed a layer of the atmosphere composed of this chemical compound
What is ozone
Why are plants useful in managing pollution?
They can absorb, concentrate, and store pollutants.
A chemical that has been studied to decrease IQ points and brain development in children
What is lead
Insects become more resistant to this in the future because they build resistance.
What are pesticides?