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35 Cards in this Set

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