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99 Cards in this Set

  • Front
  • Back
what is environmental science
study of all aspects of the envt, how nature works, how humans interact with nature, how human can solve env problems
what is sustainability
meeting the needs of the resent in an equitable and fari fashion without compromising the ability of future generations to meet their own needs
ecosystem
all the organisms, and their physical and chemical envts
biotic
living organisms
abiotic
nonliving elements of the envt
ecosystem fcts
flow of matter and energy and the processes influencing the distribution
ecosystem services
things that ecosystems do for humans
provisioning
services/goods
regulating
control processes ie absorb pollutants, regulate climate
cultural
recreational/spiritual benefits
supporting
basic ecosystem processes ie decomposition, soil formation
principles of ecosystem fct
matter and energy are conserved, ecosystems are open, processes are self-regulated, ecosystems change
negative feedback
directional change reverses direction of change-stabilizes systems
positive feedback
directional change reinforces that change-destabilizes systesm
what is science
a PROCESS that poses and answers questions objectively to increase knowledge and lessen uncertainty
ecology
the branch of env science that focuses on the abundance and distribution of organsism in relation to their envt
scientific process
begins with hypothesis
hypothesis
alternative answers to a question that can be tested by observation or experimentation
hypothesis must be ______
falsifiable by observ. or exp.
what three branches in US work together for env polic
legislative, executive, judicial
first major env policies
clean air act of 70, clean water act of 72, endangered species act 73
stakeholder involvement
people with a personal stake in issue tend to do better job
types of laws
customary, conventional, judicial
customary law
accepted norms from long-standing precedent ie japan warning US about nuclear power plant destruction
conventional law
binding treaties among countries ie 1994 convention on nuclear safety
judicial law
based on international courts
united nation
54 members, UN development program, UN env program
Regional consortia
organization of american states, EU w/ 27 member
international financial institutions
world bank/regional banks, WTO
env policy debates have 8 categories
govt vs indiv control, competing public values, uncertainty and action, which level of govt decides, govt agency with jurisdiction, protection against selfish actions, best means to an end, political power relationships
who taught human-centered view of nautre
Aristotle
american transcendental movement
emerson, whitman, thoreau
preservationist view of nature
muir and pinchot
intrinsic value
value simply for existing
instrumental value
value to be used
how many env ethics frameworks?
3
anthropocentric
only humans have intrinsic value
biocentric
all living things have intrinsic value
ecocentric
communities and ecosystems have intrinsic value
can state regulations violate federal env laws?
no
animisim
belief that living and nonliving objects possess a soul or spirit
john muir
preservationist: parks and public lands should preserve wild nature in its pristine state
gifford pinchot
conservationist: view tht public resources should be used and managed in a sustainable fashion to provide the greatest benefit to the greatest number of people
utilitarianism
example of consequence-based ethics that defines right actions as those that deliver the greatest good to the greatest number of people
virtue ethics
action is right if motivated by virtues such as kindness, honesty, loyalty, and justice
subsistence economy
society meets its needs from its environment without accumulating wealth
market economies
production and consumption of goods and services take place in markets guided by prices based on a system of currency
free market
government stays out of economy
GPI
genuine progress indicator, GDP plus or minus economic value of enhancements or degradations to the envt
protons
postitive charge
neutrons
neutral charge
electrons
negative charge
atoms of a particular element always have the same number of
protons
isotopes
same number of protons, but different number of neutrons/weight/radioactivity
covalent bond
atoms share electrons
nonpolar bonds
electrons distributed evenly
polar bond
electrons distributed unevenly
ionic salts
atoms donate electrons
dipole bonds
electrical charge shifts
water properties
polar, heat causes bonds to weaken, polar=excellent solvent
why does ph matter
chemical reacitons in environment can only take place at a specific ph, living things can live only in narrow ranges of ph
energy
capacity to do work
potential energy
stored energy ie resting
kinetic energy
energy of motion
laws of thermodynamics
energy cannot be created or destroyed, law of entropy-energy becomes less usable per each interactions
first law of thermodynamics
energy cannot be created or destroyed
second law of thermo...
law of entropy
forms of energy
electromagnetic, heat, chemical, nuclear
electromagnetic radiation
light, short wavelength=more energy, long wavelength=less energy
heat
kinetic energy of molecules, conduction (collisions) convection (circulation due to density) radiation (release of electromagnetic energy) latent heat transfer (evaporation)
chemical energy
potential energy associated with the breakage of bonds between atoms
nuclear energy
contained in structure of matter itself
energy units
joule. calorie, watt-hour/kilowatt-hour
population
group of individuals of a single species inhabiting a specific area
growth rate
birth+immigration - death+immigration
exponential population growth
growth accelerates with each generation
survivorship
probability of an organism dying withing a particular time interval
type 1 survivorship
risk of death highest when old
type 2 survivorship
risk of death same at all ages
type 3 survivorship
risk of death highest when young
fertility rate
rate of reproduction
total fertility rate
potential number of offspring that an average female in a population can produce
generation time
difference in age between mothers and offspring
logistic growth curve
carrying capacity-when curve flatlines
what are population sizes limited by
temp, chemicals, resources, ph
mechanisms of natural selection
individuals within populations vary genetically and this variability is heritable, biotic and abiotic components of an organisms envt act as selection pressures, individuals that are best suited to these selection pressures leave the most offspring
stabilizing selection
removes all extreme characteristics
finch, soapberry bug
directional selection
removes one extreme characteristic
moderate human birth rate
disruptive selection
removes moderate characteristics
metal-tolerant plants
four types of evolutionary measures
natural selection, mutation, genetic drift, gene flow
mutation
random changes in DNA
genetic drift
chance event changes frequency of trait, occurs in small/isolated populations
gene flow
transfer of genes from one population to another
layers of atmosphere from top to bottom
thermosphere, mesosphere, ozone layer, stratosphere, troposphere
layers of atmosphere from bottom to top
troposphere, stratosphere, ozone layer, mesosphere, thermosphere
earths atmospheric composition
78% nitrogen 21% oxygen .039% CO2
dew point
temperature in which relative humidity is 100%
energy budget
energy entering and leaving earth,
coriolis effect
change in wind direction due to Earths rotation