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Unit C
environmental chem
20
Science
9th Grade
03/04/2010

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Cards

Term
monitoring
Definition
keeping track of something for a specific purpose; certain chemicals are monitored in the evironment to ensure they do not exceed safe levels
Term
invertebrates
Definition
animals without backbones
Term
Toxicity
Definition
how poisonous a substance is
Term
heavy metals
Definition
metals that have a density of 5 or higher(e.g.,copper,zinc,lead,mercury,cadmium,nickel);heavy metals are one type of substance monitored to determine water quality
Term
VOC's
Definition
Term
NOx
Definition
Term
greenhouse gases
Definition
gases in Earth's atmosphere that trap the heat that forms when radiant energy from the sun reaches Earth's surface;water vapour,carbon dioxide,methane,and nitrogen oxide are all greenhouse gases
Term
water table
Definition
top of the groundwater zone
Term
pores
Definition
tiny space between soil grains or mineral grains in a rock;a substance with many pores is porous;if these pores are connected,a substance is permeable
Term
dispersion
Definition
scattering of a substance away from it's source
Term
permeable
Definition
description of a substance that contains connected pores;fluids can flow through a permeable substance
Term
leachate
Definition
liquid that dissolves and carries substance as it passes through soil
Term
dilution
Definition
mixing of a substance with air or water;this reduces the substance's connection
Term
biodegradation
Definition
breakdown of materials by organisms such as earthworms,bacteria,and fungi; "bio-" refers to living things and "degrade" means to break up
Term
anarobic
Definition
refers to processes or environments that do not require or certain oxygen("an-"means without; "aero-" means "air")
Term
phytoremdiation
Definition
clean up of the environment using plants; "phyto-" means plant and "remediation" means cleanup;plants have been used to clean up metals,hydrocarbons,and other chemicals
Term
photolysis
Definition
breakdown of compounds by sunlight;"photo" means light and "lysis" means break down
Term
biomagnification
Definition
increase in concentration of a chemical or element as it moves up the food chain
Term
Electrical discharge
Definition
sudden transfer of electrical charge from one object to another, indicated by a spark
Term
Laws of electrical charge
Definition
The magnitude of the electrostatic force between two point electric charges is directly proportional to the product of the magnitudes of each of the charges and inversely proportional to the square of the distance between the two charges.
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