Biology Vocab 9th grade
Terms
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- 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