Energy Flow in an Ecosystem — Flashcards
Maharashtra Board · Class 9 · Science
22 flashcards for Energy Flow in an Ecosystem (Maharashtra Board Class 9 Science) to test yourself on key terms and facts. Sample: "What is a food chain?"
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What is a food chain?
Answer
A food chain is a definite sequence of interactions between producers, consumers, and decomposers in an ecosystem. It shows the linear flow of energy and nutrients from one organism to another, typica…
How is a food web different from a food chain?
Answer
A food web is an intricate network of interconnected food chains in an ecosystem. While a food chain shows a linear sequence, a food web shows that one organism can be prey for many other organisms, f…
Define trophic level with examples.
Answer
A trophic level is each step in the food chain where an organism obtains its food. Examples: 1st level - Producers (green plants), 2nd level - Primary consumers (grasshopper, deer), 3rd level - Second…
What are primary consumers and give three examples?
Answer
Primary consumers are herbivores that feed directly on autotrophs (producers). They occupy the second trophic level. Examples: Grasshopper, squirrel, elephant, deer, rabbit. They are directly dependen…
Distinguish between secondary consumers and apex consumers.
Answer
Secondary consumers are carnivores that feed on herbivores (e.g., frog, owl, fox). Apex consumers are top carnivores that feed on both herbivores and other carnivores, with no natural predators (e.g.,…
What is the pyramid of energy and why does it have this shape?
Answer
The pyramid of energy shows energy transfer at each trophic level, with maximum energy at the producer level decreasing towards apex consumers. It has a pyramid shape because energy is lost as heat at…
Why is energy flow in an ecosystem called 'one way transport'?
Answer
Energy flow is 'one way' because the sun provides energy to producers, which passes through consumers and is finally dissipated by decomposers as heat. This energy never returns to the sun. Energy can…
What is a biogeochemical cycle?
Answer
A biogeochemical cycle is the cyclical flow of nutrients within an ecosystem. Nutrients necessary for organism growth are continuously transferred from abiotic to biotic factors and back, operating th…
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