Shared Flashcard Set

Details

Unit 6 vocabulary
pollution
40
Environmental Studies
12th Grade
03/14/2017

Additional Environmental Studies Flashcards

 


 

Cards

Term
acid deposition
Definition
The falling of acids and acid-forming compounds from the atmosphere to the earth's surface.
Term
air pollution
Definition
One or more chemicals in high enough concentrations in the air to harm humans, other animals, vegetation, or materials.
Term
biomagnification
Definition
Increase in concentration of DDT, PCBs, and other slowly degradable, fat-soluble chemicals in organisms at successively higher trophic levels of a food chain or web.
Term
brownfield
Definition
a former industrial or commercial site where future use is affected by real or perceived environmental contamination.
Term
buffer
Definition
Substance that can react with hydrogen ions in a solution and thus hold the acidity or pH of a solution fairly constant. .
Term
carbon monoxide
Definition
a colorless, odorless, highly toxic gas that forms during the incomplete combustion of carbon-containing materials.
Term
chlorofluorocarbons (CFCs)
Definition
Organic compounds made up of atoms of carbon, chlorine, and fluorine. An example is Freon-12 (CCl2F2), used as a refrigerant in refrigerators and air conditioners and in making plastics such as Styrofoam. They can deplete the ozone layer when they slowly rise into the stratosphere and their chlorine atoms react with ozone molecules.
Term
DDT
Definition
Dichlorodiphenyltrichloroethane, a chlorinated hydrocarbon that has been widely used as an insecticide but is now banned in some countries.
Term
dioxins
Definition
Family of 75 different chlorinated hydrocarbon compounds formed as unwanted by-products in chemical reactions involving chlorine and hydrocarbons, usually at high temperatures.
Term
dose
Definition
The amount of a potentially harmful substance an individual ingests, inhales, or absorbs through the skin.
Term
dose-response curve
Definition
Plot of data showing effects of various doses of a toxic agent on a group of test organisms.
Term
e-waste
Definition
old, end-of-life or discarded appliances using electricity. It includes computers, consumer electronics, fridges etc which have been disposed of by their original users.
Term
epidemiology
Definition
Study of the patterns of disease or other harmful effects from toxic exposure within defined groups of people to find out why some people get sick and some do not.
Term
hazardous waste
Definition
Any solid, liquid, or containerized gas that can catch fire easily, is corrosive to skin tissue or metals, is unstable and can explode or release toxic fumes, or has harmful concentrations of one or more toxic materials that can leach out. See also toxic waste.
Term
industrial smog
Definition
Type of air pollution consisting mostly of a mixture of sulfur dioxide, suspended droplets of sulfuric acid formed from some of the sulfur dioxide, and a variety of suspended solid particles.
Term
integrated waste management
Definition
Variety of strategies for both waste reduction and waste management to deal with solid wastes.
Term
LD50
Definition
the amount of a material, given all at once, which causes the death of 50% (one half) of a group of test animals. It is one way to measure the short-term poisoning potential (acute toxicity) of a material.
Term
median lethal dose (LD50)
Definition
Amount of a toxic material per unit of body weight of test animals that kills half the test population in a certain time.
Term
nitric acid (HNO3)
Definition
Formed when NO2 reacts with water vapor in the air. It is a component of acid deposition that returns to the earth and can damage trees, soils, and aquatic life in lakes.
Term
nitrogen oxides (NOx)
Definition
These gases play a role in photochemical smog and can irritate the eyes, nose, throat, and lungs; aggravate asthma and bronchitis; and increase susceptibility to respiratory infections by impairing the immune system. They can also suppress plant growth and reduce visibility when they are converted to nitric acid and nitrate salts.
Term
nonpoint source
Definition
Large or dispersed land areas such as crop fields, streets, and lawns that discharge pollutants into the environment over a large area.
Term
ozone (O3)
Definition
Colorless and highly reactive gas; a major component of photochemical smog and also found in the stratosphere where it protects life by filtering out most harmful UV radiation from the sun.
Term
ozone layer
Definition
Layer in the stratosphere that protects life on earth by filtering out most harmful ultraviolet radiation from the sun.
Term
particulates
Definition
Solid particles and liquid droplets small and light enough to remain suspended in the air for short to long periods. Also referred to as suspended particulate matter (SPM).
Term
photochemical smog
Definition
Complex mixture of air pollutants produced in the lower atmosphere by the reaction of hydrocarbons and nitrogen oxides under the influence of sunlight. Especially harmful components include ozone, peroxyacyl nitrates (PANs), and various aldehydes.
Term
point source
Definition
Single identifiable source that discharges pollutants into the environment. Examples are the smokestack of a power plant or an industrial plant, drainpipe of a meatpacking plant, chimney of a house, or exhaust pipe of an automobile.
Term
polychlorinated biphenyls (PCBs)
Definition
Group of 209 different toxic, oily, synthetic chlorinated hydrocarbon compounds that can be biologically amplified in food chains and webs.
Term
primary pollutant
Definition
Chemical that has been added directly to the air by natural events or human activities and occurs in a harmful concentration.
Term
radon (Rn)
Definition
Naturally occurring colorless and odorless radioactive gas found in some types of soil and rock. It can seep into homes and buildings sitting above such deposits. Long-term exposure can cause lung cancer, especially among smokers.
Term
response
Definition
See dose, dose-response curve, median lethal dose.
Term
sanitary landfill
Definition
Waste disposal site on land in which waste is spread in thin layers, compacted, and covered with a fresh layer of clay or plastic foam each day.
Term
secondary pollutant
Definition
Harmful chemical formed in the atmosphere when an air pollutant reacts with normal air components or other air pollutants.
Term
smog
Definition
Originally a combination of smoke and fog but now used to describe other mixtures of pollutants in the atmosphere.
Term
sulfur dioxide (SO2)
Definition
Colorless gas with an irritating odor. About two-thirds (and as high as 90% in urban areas) comes from human sources, mostly combustion of sulfur-containing coal in electric power and industrial plants and from oil refining and smelting of sulfide ores.
Term
sulfuric acid (H2SO4)
Definition
Formed in the atmosphere as microscopic suspended droplets, it is a component of acid deposition.
Term
superfund
Definition
a United States federal government program designed to fund the cleanup of sites contaminated with hazardous substances and pollutants. It was established as the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA).
Term
temperature inversion
Definition
Layer of dense, cool air trapped under a layer of less dense, warm air. This prevents upward-flowing air currents from developing. Air pollution in the trapped layer may build up to harmful levels.
Term
toxicity
Definition
Measure of how harmful a substance is.
Term
toxicology
Definition
Study of the adverse effects of chemicals on health.
Term
volatile organic compounds (VOCs)
Definition
Organic compounds that exist as gases in the air. Most are hydrocarbons.
Supporting users have an ad free experience!