Pop & Eco 5 (Energy Pyramids)

Term Definition
Energy Pyramid a diagram that shows the amount of energy that moves from one feeding level to another in a food web
Trophic Levels The levels of an energy pyramid through which energy flows from producers to primary consumers, secondary consumers and so on.
Autotroph An organism that makes its own food (a producer)
Omnivore organism that obtains energy by eating both plants and animals
Detrivore a scavenger, such as an earthworm, that feeds on dead plant and animal matter
Biomass organic matter that can be a source of energy in an ecosystem.
Photosynthesis process by which plants use the sun's energy to convert water and carbon dioxide into sugars
Reactants of Photosynthesis CO2 & H2O
Products of Photosynthesis C6H12O6 (glucose) & O2 (oxygen)
Calories Units of heat that measure the energy used by the body and the energy that foods supply to the body
Items that lack calories Water, sleep, vitamins, minerals
Items that have calories Fats, Carbohydrates, Proteins
Uses for food Energy, nutrients, building body tissue.
10% The amount of biomass energy that transfers up to the next trophic level in an ecosystem.
90% The amount of biomass energy lost beween trophic levels in an ecosystem.
Decomposers Organisms that break down wastes and dead organisms and return raw materials to the environment
Herbivores An organism that eats only plants.
Carnivores Organisms that eat other animals for energy
Detritus Dead organic matter or waste products
Heterotrophs organisms that cannot make their own food

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