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24 Cards in this Set
- Front
- Back
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A singe organism in an environment is called an _________________.
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individual
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Organisms of the same kind living in the same environment make up a _____________.
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population
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All the populations of organisms living together in an environment make up a ______________.
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community
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A community and its physical factors or environment make up an _____________.
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ecosystem
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Every population lives in a certain part of an ecosystem, known as its _____________.
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habitat
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Within an ecosystem, each population has a certain role, or ______________.
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niche
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The __________ provides the energy for almost every ecosystem on Earth.
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sun
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_______________, or plants, use the energy of the sun, change it into food, and pass it on to other organisms.
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Producers
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All other organisms in an ecosystem community must eat to get the energy they need. So the animals in a community are ________________.
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consumers
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A ______________ shows how consumers in an ecosystem are connected to one another according to what they eat.
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food chain
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First-level consumers, or ______________, eat the plants.
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herbivores
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___________________, or carnivores, eat the herbivores.
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Second-level consumers
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________________, such as mushrooms and bacteria, break down the tissues of dead organisms. They use some nutrients from the dead tissue as food.
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Decomposers
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A _____________ shows the relationships between many food chains within a single ecosystem.
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food web
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An ________________ shows the amount of energy available to pass from one level of a food chain to the next.
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energy pyramid
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Because most ecosystems don’t have unlimited resources, there may be _______________ for these resources among organisms.
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competition
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An animal that hunts
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Predator
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The animal that is hunted
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Prey
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A long term relationship between different kinds of organisms is called ________________.
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symbiosis
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An ________________ is a behavior that an organism inherits, such as building a shelter or finding a mate.
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instinct
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Behaviors that organisms have learned from their parents, not inherited from them.
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learned behaviors
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Organisms listed as _______________ have populations so small that they are likely to die out if steps aren’t immediately taken to save them.
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endangered
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Organisms listed as _______________ are likely to become endangered if they are not protected.
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threatened
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When the last individual of a population dies, that kind of organism becomes ____________________ and is gone forever.
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extinct
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