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16 terms

Energy Flow 3-2

Chapter 3 section 2
STUDY
PLAY
autotroph
organisms that capture energy from sunlight or chemicals and use that energy to produce food
producer
an autotroph, an organism that makes its own food
photosynthesis
autotrophs that use light energy to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates
chemosynthesis
autotrophs that use chemical energy to produce carbohydrates
heterotrophs
organisms that rely on other organisms for their energy and food supply
consumers
a heterotroph, an organism that cannot produce its own food or energy
herbivore
a heterotroph that obtains energy by eating only plants
carnivore
a heterotroph that obtains energy by eating animals
omnivore
a heterotroph that obtains energy by eating both plants and animals
detritivore
a heterotroph that obtains energy by feeding on plant and animal remains and other dead matter
decomposer
breaks down organic matter
food chain
a series of steps in which an organisms transfer energy by eating and being eaten
food web
feeding relationships among various organisms in an ecosystem form a network of complex interactions
trophic level
each step in a food chain or web
ecological pyramid
a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or web
biomass
total amount of living tissue within a given trophic level