The Living Earth A Final Exam Review Flashcard - Ch 3 Ecosystems

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What is an ecological pyramid?

Back

An ecological pyramid is a graphical representation that shows the relative amount of energy or matter contained in each trophic level of a food chain or food web.

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What is the role of biogeochemical cycles in the biosphere?

Back

Biogeochemical cycles transform and reuse molecules, ensuring that matter is recycled within ecosystems.

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What is denitrification?

Back

Denitrification is the process by which nitrogen is released back into the atmosphere from animal waste or decomposers.

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What defines an herbivore?

Back

An herbivore is a consumer that feeds exclusively on plants.

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Why is burning fossil fuels considered harmful to the environment?

Back

Burning fossil fuels increases the amount of carbon dioxide in the atmosphere, contributing to climate change.

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What is a trophic level?

Back

A trophic level is a position in a food chain or food web that indicates the flow of energy and nutrients from one organism to another.

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What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms.

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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 nutrients and energy pass, while a food web is a complex network of interconnected food chains.

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What is the significance of producers in an ecosystem?

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Producers, such as plants, convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.

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What are decomposers and their role in ecosystems?

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Decomposers break down dead organic matter, recycling nutrients back into the soil and supporting plant growth.