Unit 3: Energy Flow

Front

What happens to herbivore populations if a new producer is introduced into a food web?

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Herbivore populations will likely increase due to the availability of more food.

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In food chains, what is the flow of energy?

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The flow of energy in food chains is always one way, from producers to consumers.

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What happens to energy as it moves up through the levels of an energy pyramid?

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Energy decreases by 90% at each level of the energy pyramid.

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What role do decomposers play in an ecosystem?

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Decomposers are critical because they return nutrients from dead organisms to the soil.

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What must energy from food be transformed into before it can be used by cells?

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Energy from food must be transformed into ATP (adenosine triphosphate) before it can be used by cells.

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Define producers in an ecosystem.

Back

Producers are organisms that can make their own food through photosynthesis or chemosynthesis, forming the base of the food web.

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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, showing how energy and nutrients flow between organisms.

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Explain the concept of trophic levels.

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Trophic levels are the different levels in a food chain or web, representing the flow of energy from producers to various levels of consumers.

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What is the primary source of energy for most ecosystems?

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The primary source of energy for most ecosystems is sunlight.

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What is the difference between a food chain and a food web?

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A food chain is a linear sequence of organisms through which energy flows, while a food web is a more complex network of multiple food chains.