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Ecosystems
| Question | Answer |
|---|---|
| Biotic | a living thing |
| Abiotic | a nonliving thing |
| Ecosystem | all the living and nonliving things in an area that interact |
| Habitat | the environment where organisms live |
| Organism | one living thing |
| Population | a group of one type of organisms |
| Community | all the populations in one area |
| Biosphere | part of the earth that has all the ecosystems |
| Producer | an organism, as a plant, that is able to produce its own food from inorganic substances |
| Consumer | an organism, usually an animal, that feeds on plants or other animal |
| Decomposer | an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances |
| Herbivore | animals that get their energy by only eating producers or plants |
| Carnivore | animals that get their energy by only eating other consumers |
| Omnivore | animals that get their energy by eating both producers and consumers |
| Scavenger | a consumer that eats dead animals |
| Predator | any organism that exists by preying on other organisms |
| Prey | an animal hunted or seized for food |
| Niche | the role or job that an organism plays in a habitat |
| Food Chain | the path of energy flow in an ecosystem |
| Primary Consumer | the first eater in a food chain |
| Secondary Consumer | the second eater in a food chain |
| Tertiary Consumer | the third eater in a food chain |
| Autotroph | another name for a producer |
| Heterotroph | another name for a consumer |
| Terrestrial Ecosystem | a land-based community of organisms |
| Aquatic ecosystem | an ecosystem in a body of water. |
| food webs | overlapping food chains with different pathways for the flow of food energy in an ecosystem |
| energy pyramid | a diagram that shows the amount of energy passed on at each level of a food chain |
| competition | the struggle of organisms against each other to get the same resource |
| natural resources | materials in the environment that useful to people |
| population | all the organisms of the same species that love in the same place at the same time |
| estuary | a place where fresh water from a river empties into the ocean and mixes with it |
| brackish | slightly salty, as is the mixture of river water and seawater in estuaries. |
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