Ecosystems
Biology ⇒ Ecology and Environment
Ecosystems starts at 6 and continues till grade 12.
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See sample questions for grade 12
A pond ecosystem receives 10,000 J of sunlight. If the producers capture 1% of this energy, how much energy is available to primary consumers, assuming 10% transfer efficiency to the next trophic level?
Describe one way in which climate change can affect aquatic ecosystems.
Describe one way in which human activities can negatively impact ecosystems.
Describe the greenhouse effect and its impact on ecosystems.
Describe the role of decomposers in an ecosystem.
Describe the role of producers in an ecosystem.
Explain the concept of ecological niche.
Explain the concept of ecosystem services and give one example.
Explain the difference between a food chain and a food web.
Explain the difference between autotrophs and heterotrophs.
Explain the difference between primary and secondary succession.
Explain why biodiversity is important for ecosystem stability.
In a given ecosystem, the net primary productivity (NPP) is 800 kcal/m²/year and the gross primary productivity (GPP) is 1200 kcal/m²/year. Calculate the amount of energy used in plant respiration.
In an energy pyramid, why does the amount of energy decrease at each successive trophic level?
Name the two main types of ecological succession.
Which trophic level do primary consumers occupy in an ecosystem?
