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42 Cards in this Set

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  • Back
Anerobes
require oxygen for resperation
ecosystems
sizeable interacting systems composed of living organismsand their physical enviroment
habitat
a particular place or to a specific collection of organisms
tundra
a biome with predictable but harsh condtitons
biological environment
consits of the living organisms in the habitat
anaerobes
thrive only in the lack of oxygen
thermal stratification
when tempature creates diffrences between two or more layers of water
thermocline
a zone of tempature change accross little mixing takes place
humas
a sponge bed of organic matter that holds and delivers both water and neutrients
climate
consits of the means or averages of tempature, rainfall, hours of sunlight, wind speed, and so on
weather
makes up the day by day varitions and extremes in those factors
salinity
the concentration of dissolved inorganic salts
thermoregulation
the control of body temperature
endotherms
organisms who generate heat inside their tissues, conserve heat, and maintain a high body temperature
ectotherms
animals who need to sit in the sun to keep warm and at night stay underground to keep warm
microenviroments
conditions that vary over very long distances
microclimates
a microhabitats temperature, humidity, and windspeed
biomes
the earth divided into reigons characterized by diffrent compansations of enviomental conditions
mangroves
salt tolerant trees and shrugs
permafrost
permanantly frozen subsoil
coral reefs
support abundant life in neutrient poor tropical seas
tiaga
the evergreen forest
grasslands
these areas rain is too sparse or too seasonal to support forest growth
tropical rain forest
harbor more species than any other terrestrial biome
kelp
giant coldwater alge
phytoplankton
plants who drift in water
oligotrophic
clera lakes with low neutrient content and relatively little phytoplankton growth
estuary
an encloced arm of the sea that is fed by runnoff from the land
salt marshes
many temperate estuaries contain these
eutrophic
lakes with high growth and neutrents
environment
the sum of all the conditions sourrounding an organism
control
subjected to the same
conditions exept the changes in the expermental variable
inductive reasoning
a series of observations which are reproducible
hypothesis
an educated guess
deductive reasoning
this can be employed to make specific new predictions from the general statements of the hypothesis and from other generalprinciples assumed or believed to be true
scientific method
a series of ordered steps that scientists follow to acomplish a goal
gaia hypothesis
a theory that the biosphere is not just a collection fo plants and animals but a "superorganism" whose componets have evolved in ways that maintain the delicate balance necessary for planetary life
controled experiment
when a scientist performes at least two sets of parallel trials
biosphere
the planetwide network of physical environments and living organisms
experimental variable
when one set of trials is changed by one object
biological diversity
vaariety and variability in living organisms and the ecological systems in which they live
physical environment
includes all the conditions created by the nonliving componets of the organisms souroundings