8th Grade Science STAAR Review 2021

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What is the role of the Sun in a food chain?

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The Sun provides energy that is essential for photosynthesis in plants, which are the primary producers in a food chain.

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Define photosynthesis.

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Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

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What is a food chain?

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A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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What is the significance of algae in aquatic ecosystems?

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Algae are primary producers in aquatic ecosystems, providing oxygen and serving as a food source for various organisms.

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What is the relationship between shrimp and red drum in a food chain?

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Shrimp are a food source for red drum, which are carnivorous fish that rely on shrimp for energy.

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What is an ecosystem?

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An ecosystem is a community of living organisms interacting with their physical environment, including both biotic and abiotic components.

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Define biotic factors in an ecosystem.

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Biotic factors are the living components of an ecosystem, such as plants, animals, and microorganisms.

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Define abiotic factors in an ecosystem.

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Abiotic factors are the non-living components of an ecosystem, such as sunlight, water, temperature, and soil.

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What is the importance of biodiversity in an ecosystem?

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Biodiversity contributes to ecosystem resilience, productivity, and stability, allowing ecosystems to adapt to changes.

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What is a trophic level?

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A trophic level is a position in a food chain or food web, defined by how an organism obtains its energy.

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