IDS1152 Test 3 definitions
About this set
Created by:
thumpaholden Plus on October 17, 2009
Subjects:
environmental science, Fatherree, human population, air pollution, terms
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12 terms
Terms | Definitions |
|---|---|
 demography | Study of statistical changes in the human population |
| crude birth rate | Number of births per 1000 people per year in a population |
| crude death rate | Number of deaths per 1000 people per year in a population |
| life expectancy | Average number of years a newborn can expect to live |
| infant mortality rate | Number of infant deaths per 1000 live births, before they reach the age of 1 year. |
| total fertility rate | Number of children each woman will have in a lifetime. |
| replacement fertility rate | Number of offspring needed to replace their parents in a population. 2.1 per couple in humans. |
| primary pollutants | Pollutants that are harmful in the form in which they are released |
| secondary pollutants | pollutants produced when substances mix with chemicals normally found in the atmosphere to form harmful ones |
| point source pollution | Pollutants that are released from a specific location in large quantities |
| non-point source pollution | Pollution from which no single source produces large quantities, but where numerous smaller sources can release a larger total pollution |
| smog | a ground-level cloud that contains air pollutants, which typically forms over larger cities |
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