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41-60
vocab 41-60
21
Environmental Studies
12th Grade
09/28/2010

Additional Environmental Studies Flashcards

 


 

Cards

Term
Energy flow in food webs
Definition
only 10% of the usable energy is transferred because usable energy lost as heat
(2nd law), not all biomass is digested & absorbed, predators expend energy to catch prey
Term
Chlorine
Definition
(good: disinfection of water) ( bad: forms trihalomethanes)
Term
Primary succession;
Secondary succession:
Definition
development of communities in a lifeless area not previously inhabited by life (lava);
life progresses where soil remains (clear cut forest, fire)
Term
Cogeneration
Definition
using waste heat to make electricity
Term
Mutualism
Definition
symbiotic relationship where both partners benefit
Term
Commensalism:
Definition
symbiotic relationship where one partner benefits & the other is unaffected
Term
Parasitism
Definition
relationship in which one partner obtains nutrients at the expense of the host
Term
Biome
Definition
large distinct terrestrial region having similar climate, soil, plants & animals
Term
Carrying capacity
Definition
the number of individuals that can be sustained in an area
Term
R strategist
Definition
reproduce early, many small unprotected offspring
Term
K strategist:
Definition
reproduce late, few, cared for offspring
Term
Positive feedback
Definition
when a change in some condition triggers a response that intensifies the changing
condition (EX: warmer Earth - snow melts - less sunlight is reflected & more is absorbed, therefore warmer
earth)
Term
Natural selection
Definition
organisms that possess favorable adaptations pass them onto the next generation
Term
Malthus
Definition
said human population cannot continue to increase. Consequences will be war, famine & disease
Term
Doubling time
Definition
rule of 70 (70 divided by the percent growth rate)
Term
Replacement level fertility
Definition
the number of children a couple must have to replace themselves (2.1
developed, 2.7 developing)
Term
World Population is;
US Population;
Definition
6 1/2 billion;
300 million
Term
Preindustrial stage
Definition
birth & death rates high, population grows slowly, infant mortality high
Term
Transitional stage
Definition
death rate lower, better health care, population grows fast
Term
Industrial stage
Definition
decline in birth rate, population growth slows
Term
Postindustrial stage
Definition
low birth & death rates
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