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| – the place where an organism lives- an area that provides an organism with its basic needs for survival |
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| the study of interactions among organisms and their environment |
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| a close and often long-term interaction between different biological species |
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| organisms of one species living together in the same place at the same time |
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| all of the populations in an ecosystem |
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| an organism that feeds on others – it has other organisms below it on the food chain |
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| an organism that is food for others – it has other organisms above it on the food chain |
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| when different individuals perform different tasks required for the survival of the entire group |
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| organisms that use an outside energy source to make energy rich molecules (food) |
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| – an organism that obtains energy by feeding on other organisms or their remains. |
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| anything that limits the number of individuals living in a population |
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| The role a species plays within a community |
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| a type of symbiotic relationship that benefits both species |
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| a type of symbiotic relationship that benefits only one of the species |
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| a type of symbiotic relationship that benefits one species and harms the other |
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| a relationship in which one organism eats the other for food |
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| growth by doubling – “the larger the population gets, the faster it grows” |
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| the largest number of individuals of one species than an ecosystem can support over time |
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| the simple model of a feeding relationship in an ecosystem |
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| when two or more organisms need the same resource at the same time – it is highest between members of the same species |
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| – the zone of life on Earth- the top portion of the Earth’s crust, all the water that covers Earth’s surface, and the surrounding atmosphere |
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| plant eaters such as deer and rabbits |
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| organisms that eat both plants and animals |
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| meat eaters such as tigers and frogs |
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| consists of all the organisms living in an area and the nonliving features of the environment |
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| the scientific study of LIFE. |
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| a large area or geographical region with distinct plant and animal groups adapted to that environment |
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| when individuals or groups of organisms compete for similar resources such as territory, mates, water and food.
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| an organism that obtains nutrients by consuming dead and decaying organic matter. |
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| meat eaters – at or near the top of the food chain |
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| plant eaters – the second step of the food chain, just above producers |
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| plants or algae – the first step in a food chain |
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| a way of showing all possible feeding relationships in a community |
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| the amount of energy that gets transfered to each level of an energy pyramid |
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| a simple model that shows feeding relationships in an ecosystem.ex. plant is eaten by mouse, mouse is eaten by snake, snake is eaten by hawk |
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| a model of feeding relationships that shows that organisms lower on the food chain occur in higher numbers than those at the top |
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