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Ch 5 science
How Ecosystems Work
Question | Answer |
---|---|
The process by which plants,algea,and some bacteria use sunlight, carbon dioxide, and water to produce carbohydrates and oxygen. | photosynthesis |
an organism that makes its own food. also called autotrophs = self feeder. | producer |
organisms that get their energy by eating other organisms. also called heterotrophs = other feeders. | consumer |
consumers who get their food by breaking down other organisms, bacteria & fungi. | decomposer |
the process of breaking down food to yeild energy. | cellular respiration |
a sequence in which energy is transfered from one organism to the next as each organism eats another organism | food chain |
a diagram that shows the feeding relationships between organisms in a ecosystem. | food web |
one of the steps in a food chain or food pyramid | trophic level |
energy rich sugar molecules that organisms use to carry out daily activities, stored solar energy | carbohydrates |
plant eaters. | herbivore |
flesh eaters | carnivores |
eats both plans and animals | omnivores |
a process by which carbon is cycled between the atmosphere,land,water, and organisms | carbon cycle |
organisms that fix, or alter, atmosphereic nitrogen into chemical compounds that can be used by other organisms | nitrogen-fixing bacteria |
a process in which nitrogen is cycled between the atmosphere,bacteria,and other organisms | nitrgoen cycle |
the movement of phosphorus from the enviroment to organisms and then back to the enviroment | phosphorus cycle |
primary greenhouse gas | Co2 |
producers to consumers | short term carbon cycle |
carbon becomes carbonats,becomes lime stone. Carbon in dead organisms can form coal,oil,and natural gas (fossil feul) | long term carbon cycle |
a gradual process of change and replacement of the types of species in a community | ecological succesion |
a type of succession that occurs on a surface where no ecosystem exsisted before | primary succession |
the more common type of succesion,occurs on a surface where an ecosystem has previously exsisted | secondary succesion |
the first organisms to colonize any newly avalible area and begin the process of ecological succession | pioneer species |
a final and stanle community | climax community |
are important early pioneers in primary succesion. they break down rock and contribute to soil development | lichens |