6 Questions
Which of the following describes the flow of energy in an ecosystem?
Energy flows from producers to herbivores to carnivores
Which of the following is a biotic factor in an ecosystem?
Grass
What is the primary role of nitrogen in the ecosystem?
To form the structure of DNA and proteins in living organisms
Match the following components with their roles in an ecosystem:
Food chain = Shows the flow of energy and nutrients between species Biotic factors = Living organisms that affect the ecosystem Carbon cycle = Movement of carbon through living and non-living components Oxygen = Essential for the respiration of organisms
Match the following terms with their relevance to ecosystem sustainability:
Nitrogen = Critical for plant growth and soil fertility Food web = Illustrates complex feeding relationships in an ecosystem Abiotic factors = Non-living elements influencing ecosystem dynamics Energy flow = Determines the efficiency of nutrient transfer within the ecosystem
Match the following concepts with their impact on ecological balance:
Energy flow = Regulates population dynamics and trophic interactions Food chain = Demonstrates predator-prey relationships in an ecosystem Nitrogen cycle = Crucial for maintaining soil productivity and biodiversity Biotic factors = Influences species diversity and ecological succession
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.
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.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
