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 11
Describe how ecological pyramids can be used to assess the impact of human activities on ecosystems.
Describe how the presence of decomposers affects the accuracy of ecological pyramids.
Describe one situation where the pyramid of numbers is inverted.
Describe the main difference between a pyramid of biomass and a pyramid of energy.
If 10,000 J of energy is available at the producer level, how much energy would typically be available to the secondary consumers?
If a food chain has four trophic levels and the energy at the producer level is 20,000 J, calculate the expected energy at the top consumer level.
If a pyramid of energy shows 1000 kcal at the producer level, how much energy would you expect at the tertiary consumer level?
If the biomass of producers in a pond ecosystem is 500 kg and the biomass of primary consumers is 100 kg, what is the biomass of secondary consumers likely to be?
Which of the following best describes an ecological pyramid? (1) A graphical representation of the number of organisms at each trophic level (2) A graphical representation of the biomass at each trophic level (3) A graphical representation of the energy at each trophic level (4) All of the above
Which of the following best explains why energy decreases at each successive trophic level? (1) Energy is created at each level (2) Energy is lost as heat (3) Energy is stored in the soil (4) Energy is recycled completely
Which of the following best explains why the pyramid of numbers may be narrow at the base in a forest ecosystem? (1) Many small producers (2) Few large producers (3) Many large producers (4) Few small producers
Which of the following is a limitation of the pyramid of numbers? (1) It does not consider the size of organisms (2) It ignores decomposers (3) It may be inverted (4) All of the above
Fill in the blank: In an ecological pyramid, tertiary consumers occupy the _______ trophic level.
Fill in the blank: The graphical representation of energy content at each trophic level per unit area per unit time is called the pyramid of _______.
Fill in the blank: The graphical representation of the number of individuals at each trophic level is called the pyramid of _______.
Fill in the blank: The loss of energy at each trophic level is mainly due to _______.
True or False: Decomposers are always included in ecological pyramids.
True or False: In an aquatic ecosystem, the pyramid of numbers is always upright.
True or False: In most ecosystems, the pyramid of energy is always upright.
True or False: The 10% law of energy transfer applies to all ecosystems.
