Food Chains, Webs, and Pyramids

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What is a food chain?

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A food chain is a linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem, starting from producers to various levels of consumers.

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What is a food web?

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A food web is a complex network of interconnected food chains in an ecosystem, illustrating how different organisms are related through feeding relationships.

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What is a producer?

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A producer is an organism, typically a plant or algae, that can make its own food through photosynthesis, serving as the base of the food chain.

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What is a consumer?

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A consumer is an organism that obtains energy by eating other organisms, including plants (herbivores) and other animals (carnivores and omnivores).

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What is a decomposer?

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A decomposer is an organism, such as bacteria or fungi, that breaks down dead organic material, returning nutrients to the soil and completing the nutrient cycle.

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What is an energy pyramid?

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An energy pyramid is a graphical representation that shows the flow of energy at different trophic levels in an ecosystem, with producers at the base and top predators at the apex.

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What is a primary consumer?

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A primary consumer is an organism that eats producers; they are typically herbivores that feed on plants.

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What is a secondary consumer?

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A secondary consumer is an organism that eats primary consumers; they can be carnivores or omnivores.

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What is a tertiary consumer?

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A tertiary consumer is an organism that eats secondary consumers; they are often top predators in the food chain.

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What does the direction of arrows in a food web indicate?

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The arrows in a food web indicate the direction of energy flow, pointing from the organism that is being eaten to the organism that is doing the eating.