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42 Cards in this Set
- Front
- Back
Anerobes
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require oxygen for resperation
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ecosystems
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sizeable interacting systems composed of living organismsand their physical enviroment
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habitat
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a particular place or to a specific collection of organisms
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tundra
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a biome with predictable but harsh condtitons
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biological environment
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consits of the living organisms in the habitat
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anaerobes
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thrive only in the lack of oxygen
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thermal stratification
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when tempature creates diffrences between two or more layers of water
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thermocline
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a zone of tempature change accross little mixing takes place
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humas
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a sponge bed of organic matter that holds and delivers both water and neutrients
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climate
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consits of the means or averages of tempature, rainfall, hours of sunlight, wind speed, and so on
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weather
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makes up the day by day varitions and extremes in those factors
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salinity
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the concentration of dissolved inorganic salts
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thermoregulation
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the control of body temperature
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endotherms
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organisms who generate heat inside their tissues, conserve heat, and maintain a high body temperature
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ectotherms
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animals who need to sit in the sun to keep warm and at night stay underground to keep warm
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microenviroments
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conditions that vary over very long distances
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microclimates
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a microhabitats temperature, humidity, and windspeed
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biomes
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the earth divided into reigons characterized by diffrent compansations of enviomental conditions
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mangroves
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salt tolerant trees and shrugs
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permafrost
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permanantly frozen subsoil
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coral reefs
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support abundant life in neutrient poor tropical seas
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tiaga
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the evergreen forest
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grasslands
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these areas rain is too sparse or too seasonal to support forest growth
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tropical rain forest
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harbor more species than any other terrestrial biome
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kelp
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giant coldwater alge
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phytoplankton
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plants who drift in water
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oligotrophic
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clera lakes with low neutrient content and relatively little phytoplankton growth
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estuary
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an encloced arm of the sea that is fed by runnoff from the land
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salt marshes
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many temperate estuaries contain these
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eutrophic
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lakes with high growth and neutrents
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environment
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the sum of all the conditions sourrounding an organism
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control
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subjected to the same
conditions exept the changes in the expermental variable |
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inductive reasoning
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a series of observations which are reproducible
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hypothesis
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an educated guess
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deductive reasoning
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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
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scientific method
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a series of ordered steps that scientists follow to acomplish a goal
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gaia hypothesis
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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
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controled experiment
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when a scientist performes at least two sets of parallel trials
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biosphere
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the planetwide network of physical environments and living organisms
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experimental variable
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when one set of trials is changed by one object
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biological diversity
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vaariety and variability in living organisms and the ecological systems in which they live
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physical environment
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includes all the conditions created by the nonliving componets of the organisms souroundings
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