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APES: Semester 2 Review
Also known as "55 more ways to go APES, Second-semester flash cards." Definitions are not my own. (:
Terms in this set (69)
natural radioactive decay
unstable radioisotopes decay, releasing gamma rays, as well as alpha and beta particles
the time it takes for the mass of a radioisotope to decay; each element has a specific half-life that can be seconds to thousands of years
nulei of isotopes split apart when struck by neutrons
two isotopes are light elements (such as H) are forced together at high temperatures until they fuse to form a heavier nucleus; expensive and not cost-effective yet as an answer to the nuclear waste problem
a rock that contains a large enough concentration of mineral, making it profitable to mine
best solution to energy shortage; also paired with an increase in efficiency
the type of mining that is cheap, can remove more mineral, and is less hazardous to workers
a source from a specific location, such as a pipe
a source from over an area such as runoff (storm drains)
biological oxygen demand
also known as BOD, the amount of dissolved oxygen needed by aerobic decomposers to break down organic materials
rapid algal growth caused by an an excess of nitrogen and phosporous
when aquatic organisms die, the BOD rises as aerobic decomposers break down the plants, the DO drops, and water cannot support life; low oxygen conditions
primary air pollutants
produced by humans and nature (CO, CO2, SO2, NO, hydrocarbons and particulates)
secondary air pollutants
formed by the reaction of primary pollutants
source of particulate matter
the burning/oxidation of fossil fuels and car exhuast
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