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 8
Describe one reason why a pyramid of numbers might be inverted in a forest ecosystem.
Describe the difference between a pyramid of numbers and a pyramid of biomass.
Describe what would happen to the shape of an ecological pyramid if a large number of primary consumers were removed from an ecosystem.
Explain why energy transfer between trophic levels is inefficient.
Describe what would happen to the shape of an ecological pyramid if a large number of primary consumers were removed from an ecosystem.
If 10,000 J of energy is available at the producer level, how much energy would typically be available to the primary consumers?
If a grassland ecosystem has 1000 kg of grass, 100 kg of grasshoppers, and 10 kg of frogs, what is the shape of the pyramid of biomass?
If a pyramid of numbers in a grassland ecosystem has 5000 grasses, 500 grasshoppers, 50 frogs, and 5 snakes, what is the shape of the pyramid?
In a pond ecosystem, which organism would most likely be at the base of the pyramid of numbers?
(1) Fish
(2) Zooplankton
(3) Phytoplankton
(4) Frogs
Which of the following best explains why the pyramid of energy is a better indicator of ecosystem function than the pyramid of numbers?
(1) It shows the size of organisms
(2) It shows the flow of energy
(3) It shows the number of organisms
(4) It shows the color of organisms
Which of the following best represents the correct order of trophic levels from base to top in an ecological pyramid?
(1) Producers → Primary consumers → Secondary consumers → Tertiary consumers
(2) Primary consumers → Producers → Secondary consumers → Tertiary consumers
(3) Tertiary consumers → Secondary consumers → Primary consumers → Producers
(4) Producers → Secondary consumers → Primary consumers → Tertiary consumers
Which of the following is a limitation of the pyramid of numbers?
(1) It does not consider the size of organisms
(2) It always shows an upright shape
(3) It measures energy flow
(4) It is only used in aquatic ecosystems
Fill in the blank: In a pyramid of biomass for an aquatic ecosystem, the base is often ______ than the level above it.
Fill in the blank: The amount of energy transferred from one trophic level to the next is usually about ______ percent.
Fill in the blank: The energy available to the next trophic level is always ______ than the previous level.
Fill in the blank: The first trophic level in any ecological pyramid is always occupied by ______.
True or False: Decomposers are always shown in ecological pyramids.
True or False: In a forest ecosystem, the pyramid of numbers is always upright.
True or False: The base of an ecological pyramid always represents producers.
True or False: The energy content at each trophic level is measured in units such as kilojoules or kilocalories.
