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39 Cards in this Set

  • Front
  • Back
any basic, unique form of matter
element
pathways which move matter essential to living organisms through ecosystems
biogeochemical cycles
process which converts the energy of the sun into chemical energy
photosynthesis
the process used to convert molecules into usable energy
cellular respiration
the dry weight of all material in an ecosystems
biomass
the rate at which biomass is made in an ecosystem
productivity
the position of a species in a food chain is it's...
trophic level
species which feed on only plants
herbivores
species which occurs only in one community is called
endemic
a species which comes into a community and significantly changes it is called
invasive
a group of organisms with similar characteristics that can interbreed and product fertile offspring
species
organsims which get their energy direclty from the tissues of plants
herbivores
organisms which return the organic matter of dead organisms to the environment
detritivores
all members of a particular ecosystem
community
the vegetation in an ecosystem
landscape
the crust of the earth
lithosphere
a transitional area between ecosystems
ecotone
a terrestrial ecosystem
biome
broad leafed trees, midlatitudes, precipitation throughout the year
temperate deciduous forest
very little rainfall, rain often in isolated storm months or years, driest biome
desert
long, cold winters and short, cool summer. a few species of evergreens dominate a broad area
boreal forest
mild, wet winters; warm, dry summers, patches of evergreen shrubs, often dense, frequent fires
chaparral
year round rain and warm temperatures, high biodiversity, different species of trees
tropical rain forest
extreme to moderate temperature differences between winter and summer, diminished rainfall
temperate grassland
extremely cool winters with little daylight, dry cool summers, with long days, permafrost
tundra
warm year round with relatively low rainfall, half year wet and dry seasons, trees
temperate rainforest
holds the structure of the ecosystems together, often tertiary producers
keystone species
a species whose numbers are so low that they may not be able to produce a next generation
endangered species
species that colonize bare ground in the process of primary succession
pioneer species
an evironment's maximum population size
carrying capacity
an economist whose description of a "struggle for existence" in human populations greatly influenced Darwin's theory of evolution
Thomas Malthus
biologist who independently developed a theory similar to Darwin's
Algred Russell Wallace
all material in the universe that has mass and occupies space
matter
an intangible phenomenon tha tcan change the position, physical composition, or temperature, of matter
energy
organisms which make their own food from energy in the environment
autotrophs
the process which accomplishes this using the energy of the sun
photosynthesis
the specific environment in which an organism lives
habitat
an organism's use of resource and it's functional role in a community
niche
major regional complex of similar communities
biome