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Ecosystems & Biomes

QuestionAnswer
energy role how an organism obtains energy and how it interacts with the other organisms in its ecosystem
producer an organism that can make its own food
consumer an organism that obtains energy by feeding on other organisms
herbivore consumer that eats only plants
carnivore consumer that eats only animals
omnivore consumer that eats both plants and animals
scavenger carnivore that feeds on the bodies of dead organisms
decomposers organisms that break down wastes and dead organisms and return the raw materials to the environment
food chain a series of events in which one organism eats another and obtains its energy
food web many overlapping food chains within an ecosystem
energy pyramid a diagram that shows the amount of energy that moves from one feeding level to another
evaporation the process by which molecules of liquid water absorb energy and change to water vapor
water cycle the continuous process by which water moves from Earth's surface to the atmosphere and back
condensation the process by which a gas changes to a liquid
precipitation rain, snow, sleet, hail
biogeography the study of where organisms live
dispersal the movement of organisms from one place to another
native species species that have naturally evolved in an area
exotic species an organism that has been carried into a new location by people
climate the typical weather pattern in an area over a long period of time
biome a group of ecosystems with similar climates and organisms
rain forest receive an enormous amount of rain each year
desert receive very little rain
grassland typically populated by grasses and other non
deciduous trees trees that lose their leaves
coniferous trees trees that produce their seeds in cones and have leaves shaped like needles
tundra an extremely cold, dry, land biome
permafrost frozen soil of the tundra
estuary where the fresh water of a river meets the salt water of the ocean
succession the series of predictable changes that occur in a community over time
primary succession series of changes that occur in an area where no ecosystem previously existed
pioneer species the first species to populate an area
secondary succession series of changes that occur after a disturbance in an existing ecosystem
autotroph organism that makes its own food
heterotroph organism that cannot make its own food
trophic level feeding level in an ecosystem (energy pyramid)
1st level consumer consumer that feeds directly on producers
2nd level consumer consumer that eats 1st level consumers
3rd level consumer consumer that eats 2nd level consumers
transpiration evaporation of water from a plant's leaves
nitrogen fixation the process by which certain bacteria convert nitrogen gas to a usable form
Created by: skrebbeks
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