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Chapter 3

Environmental Science Vocab

QuestionAnswer
eats both plants and animals omnivore
relies on others for food heterotroph
organism that produces its own food autotroph
feeds on dead animal/plant remains decomposer
plant eater herbivore
meat eater carnivore
first producer of high energy compounds, later used by other organisms primary producer
obtains food by consuming others consumer
chemical energy is used to produce carbohydrates chemosynthesis
consumers carcasses of dead animals scavenger
transfer of energy as animals eat or are eaten food chain
each step in a food chain or web trophic level
total amount of living tissue within a trophic level biomass
illustration of energy/matter within each trophic level in a food chain ecological pyramid
network of complex feeding relationships within an ecosystem food web
photosynthetic algae found near the surface of the ocean phytoplankton
small free floating animals that form part of plankton zooplankton
bacteria convert nitrates into nitrogen gas denitrification
chemical substance an organism needs to survive nutrient
path that nitrogen compounds take through the biosphere nitrogen cycle
path that phosphorus takes as it travels through the biosphere phosphorus cycle
path that carbon compounds take as the cycle through the biosphere carbon cycle
process of converting nitrogen gas into useable compounds by plants nitrogen fixation
process in which elements, compounds, and matter are passed on from one organism to another biochemical cycle
single essential nutrient that limits production in an ecosystem limiting nutrient
Created by: jamesweide
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