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Climate Change Tipping Points
Thresholds beyond which natural systems could change for hundreds to thousands of years
Zone of Physiological Stress
organisms begin to suffer and populations decline due to tolerance.
endangered
A(n) _________ species has so few individual survivors that the species could soon become extinct
According to biodiversity researchers, the greatest threat to wild species is
Habitat loss, degradation, and fragmentation
Density-independent factors
do not depend on how big the population is, for example a hurricane or earthquake. These events will alter any population, of any size.
Density-dependent factors
depend on how big the population is, for example access to food. The bigger the population, the more difficult it is to access food.
Cirrus Clouds
High altitude clouds that warm the lower atmosphere by allowing sunlight to reach earth's surface and preventing some heat from escaping into space
Cumulus Clouds
Low altitude clouds that have a cooling effect on earth by reflecting more sunlight back into space
Mass Extinction
The extinction of many species in a short period of time
Scientists estimate that the background extiction rate amounts to a loss of about…
1 species per year for every 1 million species living on earth
When permafrost melts, CO2 and CH4 are released, which are…
Greenhouse Gases
Biomagnification
A chemical that becomes more concentrated as it moved up through food chains and webs
The melting of ice/snow, which leads to decreased albedo, which leads to increased temperatures, which leads to the melting of ice/snow, which leads to decrease albedo, which leads to increased temperatures, is an example of a….
Positive Feedback Loop
Note 
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