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35 Cards in this Set
- Front
- Back
An organism's ___________ role in an ecosystem may be that of producer, consumer, or decomposer.
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energy
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an organism that makes its own food
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producer
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an organism that obtains energy by feeding on other organisms
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consumer
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consumers that eat only plants i.e. caterpillars, cattle, deer
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herbivores
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consumers that eat only animals i.e. lions, spiders, snakes
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carnivores
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consumers that eat plants and animals i.e. goats, crows, most humans
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omnivores
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carnivore that feed on bodies of dead organisms
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scavenger
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organisms that break down waste and dead organisms and return the raw materials to the environment (bacteria, fungi, mushroom)
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decomposer
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series of events in which one organism eats another and obtains energy (sunlight, grass, mouse, kestrel)
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food chain
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many overlapping food chains in an ecosystem
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food web
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consumer that eats the producer
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first level consumer
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consumer that eats the first level consumer
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second level consumer
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diagram that shows the amount of energy that moves from one feeding level to another in a food web
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energy pyramid
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most energy is available at the _______ level of a food pyramid
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producer
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at each level of the energy pyramid there is ______ available energy than at the level below
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less
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the processes of evaporation, condensation, and precipitation make up the ________ cycle
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water
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process by which molecules of liquid water absorb energy and change to the gas state
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evaporation
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process by which a gas changes to a liquid
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condensation
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eventually the heavy droplets of water vapor fall back to earth as _____
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precipitation
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process during which producers use carbon from the carbon dioxide to produce other carbon containing molecules
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photosynthesis
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process of changing free nitrogen gas into a usable form of nitrogen
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nitrogen fixation
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bumps on plants where bacteria live
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nodules
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veryslow motion of the continents
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continental drift
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life description - where living things are found on earth
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biogeography
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movement of organisms from one place to another
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dispersal
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species that have naturally evolved in an area
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native species
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when an organism is carried into a new location by people
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exotic species
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3 factors that limit dispersal of a species
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physical barriers, competition, climae
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group of ecosystems with similar climates and organisms
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biome
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leafy roof formed by tall trees in a tropical rain forest
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canopy
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area that receives <25cm of rain per year
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desert
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mostly treeless prairie with 25-75 cm of rain per year that grows grasses and nonwoody plants
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grassland
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grassland that receives 120 cm rain yearly; scattered shrubs and small trees
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savannas
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shed their leaves and grow new ones each year
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deciduous trees
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trees that produce seeds in cones and leaves shaped like needles
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coniferous trees
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