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Questions and Answers
Which of the following describes the flow of energy in an ecosystem?
Which of the following describes the flow of energy in an ecosystem?
- Energy is static and does not flow within the ecosystem
- Energy flows from producers to herbivores to carnivores (correct)
- Energy flows from carnivores to producers to herbivores
- Energy is recycled through the food web
Which of the following is a biotic factor in an ecosystem?
Which of the following is a biotic factor in an ecosystem?
- Rocks
- Water
- Grass (correct)
- Sunlight
What is the primary role of nitrogen in the ecosystem?
What is the primary role of nitrogen in the ecosystem?
- To produce oxygen for respiration
- To release carbon dioxide during decomposition
- To form the structure of DNA and proteins in living organisms (correct)
- To provide energy for photosynthesis
Match the following components with their roles in an ecosystem:
Match the following components with their roles in an ecosystem:
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Match the following terms with their relevance to ecosystem sustainability:
Match the following terms with their relevance to ecosystem sustainability:
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Match the following concepts with their impact on ecological balance:
Match the following concepts with their impact on ecological balance:
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Study Notes
Energy Flow in Ecosystems
- Energy flows from producers to consumers in an ecosystem, with some energy lost as heat at each trophic level.
Biotic Factors in Ecosystems
- Living components, such as plants, animals, and microorganisms, that affect the ecosystem are biotic factors.
Role of Nitrogen in Ecosystems
- Nitrogen plays a crucial role in ecosystems as a key nutrient for plant growth and development.
Ecosystem Components and Their Roles
- Producers (plants, algae, and some bacteria) produce their own food through photosynthesis.
- Consumers (herbivores, carnivores, omnivores) obtain energy by consuming other organisms.
- Decomposers (bacteria, fungi) break down dead organic matter, releasing nutrients back into the ecosystem.
Ecosystem Sustainability
- Biodiversity refers to the variety of species, genes, and ecosystems in an ecosystem, ensuring its sustainability.
- Carrying capacity is the maximum population size an ecosystem can support indefinitely.
- Conservation involves preserving and restoring ecosystems to maintain their natural functions.
Ecological Balance
- Population growth and resource competition can disrupt ecological balance, leading to changes in population sizes and community structures.
- Species extinction can have cascading effects on ecosystems, altering nutrient cycling and energy flow.
- Human activities, such as pollution and habitat destruction, can disrupt ecological balance, leading to ecosystem degradation.
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Description
Test your knowledge of energy flow in ecosystems, food chains, food webs, biotic and abiotic factors, as well as the nitrogen, oxygen, and carbon cycles with this quiz designed for 7th graders.
