Ecological Pyramids
Biology ⇒ Ecology and Environment
Ecological Pyramids starts at 8 and continues till grade 12.
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See sample questions for grade 10
Describe how the shape of an ecological pyramid can indicate the stability of an ecosystem.
Describe one reason why the pyramid of numbers may be inverted in a tree ecosystem.
Describe one way human activities can affect ecological pyramids.
Describe the main difference between a pyramid of biomass and a pyramid of energy.
Explain why decomposers are often not included in ecological pyramids.
Explain why food chains rarely have more than four or five trophic levels.
Explain why the pyramid of biomass may be inverted in aquatic ecosystems.
Explain why the pyramid of energy is always upright.
If a pyramid of numbers in a grassland ecosystem has 1,000 grasses, 100 grasshoppers, 10 frogs, and 1 snake, what is the shape of the pyramid?
If the energy at the secondary consumer level is 100 kJ, estimate the energy at the producer level, assuming 10% energy transfer efficiency at each level.
If the producers in an ecosystem have 10,000 kJ of energy, how much energy would you expect to be available to the primary consumers?
In a food chain, if the biomass of producers is 500 kg, and the biomass of primary consumers is 50 kg, what is the shape of the pyramid of biomass?
What is an ecological pyramid?
