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APeS midterm Chapter 3
APES 3
26
Science
12th Grade
12/13/2009

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Term
Ecology
Definition
THe study of connections in the natural world
Term
5 levels of ecosystem organization
Definition
biosphere, ecosystem, community, population, organism
Term
4 spheres of earths life support systems
Definition
atmosphere, hydrosphere, lithospehre, biosphere
Term
one way flow of energy and cycling of matter
Definition
high quality solar energy through materials and living things produces low quality energy. ENergy cannot be recycled.
Term
ecological pyramids of energy flow;
Definition
a diagram representing the flow of energy through each trophic level in a food chain or food web
Term
biomass numbers
Definition
biomass is the dry weight of all organic matter contianed in its organisms
Term
matter cycles; water, carbon, nitrogen, phosphorus, sulfur
Definition
matter cycles thorugh parts of the biosphere greenhouse gases trap heat to warm troposphere
Term
Trophic levels
Definition
all organisms that are the same number of energy tranfers away from the original source of energy. (for example sunlgiht enters an ecosystem. all producers belong to the first trophic level and all herbivores belong to the second trophic level in a food chain or food web.
Term
herbivore
Definition
plant eating organism such as dere sheep, grasshoppers and zooplankton.
Term
carnivore
Definition
animal that feeds on other animals (meat)
Term
detrivore
Definition
consumer organism that feeds on detritus parts of dead organism and cast off fragments and wastes of lving organism. ex are earthworms, termites, and crabs
Term
Omnivore
Definition
animal that can use both plants and other animals as food sources ex are pigs, rats, and cockaroaches
Term
scavengers
Definition
organism that feeds on dead organism that were killed by other organisms or died naturally examples include vulture roragism s, flies and crows.
Term
abiotic factor
Definition
component that makes up the biosphere and its ecosystem consist of nonliving components such as water air, nturietns, and solar energy.
Term
biotic factor
Definition
consist of living and once living biological components, plants animals, and microbes, and dead organisms.
Term
law of tolerance
Definition
the distribution of a species in an ecosystem is determined by levels of one or more physical or chemical factors being within the range tolerated by that species
Term
producers
Definition
also called autotrophs, they make their own food from compounds in the environment
Term
consumers
Definition
also called heterotrophs, and feed on other organisms or their remains.
Term
decomposers
Definition
break down organic detritus bacteria into simpler organic compounds
Term
ecosystem services
Definition
food chain and food web, food chain prodcuers belong to the first trophic level, primary consumers belong to the second trophic level, and secondary consumers belogn to the third, and detrivores and decomposers process detritus from all trophic levels.
Term
GPP
Definition
the rate at which an ecosystem's producers convert solar energy into chemical energy as biomass is found into their tissues
Term
NPP
Definition
rate at whic all the plants in an ecosystem produce useful chemical energy; equal to the difference betwen betwen the rate at which the plants in acn ecosystem produce useful hmical energy GPP at rate which they use some of the energy of respiration.
Term
Photosynthesis
Definition
a process that converts carbon dioide tinto organic compounds especially sugars usign energy from the sunlight.
Term
aerobic respiration
Definition
uses oxygen to convert glucose back into carbon dioxide and water
Term
food chain
Definition
series of organisms in which each eats or decomposes the previous one
Term
food web
Definition
interconnected food chains that shows how proudcers, consumers, and decomposers are connected to one anothe as energy flows thorgh trophic levels
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