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APES Unit 8 REVIEW Questions and Answers

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APES Unit 8 REVIEW Questions and Answers Algal Bloom An immediate increase in the amount of algae and other producers that results from a large input of a limiting nutrient. Biochemical Oxygen Demand (BOD) Amount of oxygen required by aquatic bacteria to decompose given load of organic wa...

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  • December 2, 2024
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APES Unit 8 REVIEW Questions and
Answers
Algal Bloom - answer An immediate increase in the amount of algae and other
producers that results from a large input of a limiting nutrient.

Biochemical Oxygen Demand (BOD) - answer Amount of oxygen required by aquatic
bacteria to decompose given load of organic waste; a measure of water pollution.

Biomagnification - answer The increase in chemical concentration in animal tissues
as the chemical moves up the food chain. the higher the trophic level, the higher the
concentration

example of biomagnification - answer eggshell thinning and developmental
deformities in top carnivores of the higher trophic levels

effects of biomagnification on humans - answer include issues with the reproductive,
nervous and circulatory systems

substances that bioaccumulate and have significant environmental impacts - answer
DDT, mercury, and PCBs (polychlorinated biphenyls)

Polychlorinated biphenyls (PCBs) - answer A group of industrial compounds used to
manufacture plastics and insulate electrical transformers, and responsible for many
environmental problems.

Bioaccumulation - answer the selective absorption and concentration of elements or
compounds by cells in a living organism, most commonly fat-soluble compounds

Boom - answer Temporary floating barrier used to contain an oil spill.

Bubonic Plague - answer Disease brought to Europe from the Mongols during the
Middle Ages. It killed 1/3 of the population and spread through the bite of an organism
inflected with the plague bacteria (rats and fleas) or through contact with contaminated
fluids or tissues

Cholera - answer An acute intestinal infection caused by ingestion of bacteria
contaminated water or food

Composting - answer A process that allows the organic material in solid waste (such
as food scraps, paper, yard waste) to be decomposed and reintroduced into the soil,
often as fertilizer.

, drawbacks of composting - answer odor and rodents, can attract predatory animals
such as bears

how can e-waste be reduced? - answer by recycling and reusing

negative impacts of e-waste - answer may contain hazardous chemicals, including
heavy metals such as lead and mercury, which can leach from landfills into groundwater
if they are not disposed of properly

landfill mitigation strategies - answer range from burning waste for energy to
restoring habitat on former landfills for use as parks

negative impacts on coral reefs - answer increasing ocean temperatures, sediment
runoff, and destructive fishing practices have caused damage to coral reefs

Coral Bleaching - answer A phenomenon in which algae inside corals die, causing
the corals to turn white.

Dead Zone - answer In a body of water, an area with extremely low oxygen
concentration and very little life. (ex. end of Mississippi River) caused by increased
nutrient pollution

Decomposition - answer A chemical reaction that breaks down compounds into
simpler products. AB->A+B

effects of oil spills - answer cause organisms to die from the hydrocarbons in the oil;
oil that floats on the surface can coat the feathers of birds and fur of marine mammals;
oil that sinks to the ocean floor can kill bottom-dwelling organisms

economic consequences of oil spills - answer can negatively impact the fishing
industry and tourism

Disperant - answer Improve the separation of particles and to prevent settling or
clumping (ex. cleaning up an oil spill in an ocean & dumping chemicals in the ocean to
clean it up)

Dose Response Curve - answer Describes the magnitude of the response of an
organism, as a function of exposure (or doses) to a particular toxin or drug after a
certain exposure time

why is it difficult to establish a cause and effect between pollutants and human health
issues? - answer because humans experience exposure to a variety of chemicals
and pollutants

E-Waste - answer Discarded electronic equipment such as computers, cell phones,
television sets, etc.

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