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.
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.
Explain why decomposers are often not included in ecological pyramids.
In a grassland ecosystem, which organism would be at the top of the pyramid of numbers?
(1) Grass
(2) Grasshopper
(3) Frog
(4) Hawk
Which of the following best describes a pyramid of biomass?
(1) Shows the number of organisms at each trophic level
(2) Shows the total dry mass of organisms at each trophic level
(3) Shows the energy flow at each trophic level
(4) Shows the height of organisms at each trophic level
Which of the following best describes the relationship between trophic levels and ecological pyramids?
(1) Each trophic level represents a different species
(2) Each trophic level represents a group of organisms with the same feeding position
(3) Trophic levels are not related to ecological pyramids
(4) Trophic levels only exist in aquatic ecosystems
Which of the following best explains why energy transfer between trophic levels is inefficient?
(1) All energy is used for growth
(2) Some energy is lost as heat and through metabolic processes
(3) Energy is created at each level
(4) Energy is stored indefinitely
Fill in the blank: In a forest ecosystem, the pyramid of numbers is often _______.
Fill in the blank: In an upright pyramid of numbers, the number of organisms _______ as you move up the trophic levels.
Fill in the blank: Only about _______ percent of energy is transferred from one trophic level to the next.
Fill in the blank: The _______ are at the base of the pyramid of energy.
True or False: Decomposers are always shown in ecological pyramids.
True or False: Energy is lost at each trophic level, mainly as heat.
True or False: The number of trophic levels in an ecological pyramid is usually limited to four or five.
True or False: The pyramid of biomass in a forest ecosystem is usually upright.
