Energy Flow in Ecosystems
Biology ⇒ Ecology and Environment
Energy Flow in Ecosystems starts at 7 and continues till grade 12.
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See sample questions for grade 8
Describe the difference between a food chain and a food web.
Describe the role of sunlight in the energy flow of an ecosystem.
Describe what happens to the amount of available energy as you move up the trophic levels in an ecosystem.
Explain why energy cannot be recycled in an ecosystem.
If a food chain is: Algae → Small Fish → Large Fish → Bird, which organism is the secondary consumer?
If a grassland ecosystem receives 10,000 units of energy from the sun, approximately how much energy is available to primary consumers?
If a secondary consumer eats a primary consumer that has 500 units of energy, how much energy does the secondary consumer receive?
In a forest ecosystem, if the population of primary consumers decreases, what is likely to happen to the population of producers?
Which of the following best describes a food chain?
(1) A network of interconnected food webs
(2) A sequence showing who eats whom in an ecosystem
(3) The total number of organisms in an ecosystem
(4) The process of photosynthesis
Which of the following best describes the 10% rule in energy transfer?
(1) 10% of energy is lost at each level
(2) 10% of energy is transferred to the next level
(3) 10% of organisms survive at each level
(4) 10% of producers are eaten
Which of the following best explains why energy flow in ecosystems is described as a pyramid?
(1) Energy increases at higher levels
(2) Energy is equal at all levels
(3) Energy decreases at each higher level
(4) Energy flows in a circle
Which of the following best represents the correct order of energy flow in a simple food chain?
(1) Producer → Primary Consumer → Secondary Consumer
(2) Secondary Consumer → Producer → Primary Consumer
(3) Primary Consumer → Producer → Secondary Consumer
(4) Producer → Secondary Consumer → Primary Consumer
Energy is lost at each trophic level in the form of ________.
Fill in the blank: Animals that feed on dead organic matter are called ________.
Fill in the blank: Organisms that eat both plants and animals are called ________.
Fill in the blank: The arrows in a food chain or food web represent the flow of ________.
True or False: All energy in an ecosystem eventually comes from the sun.
True or False: Carnivores can be both secondary and tertiary consumers.
True or False: Decomposers are essential for recycling nutrients in an ecosystem.
True or False: Energy flows in a cycle within an ecosystem.
