Energy Flow in Ecosystems
Biology ⇒ Ecology and Environment
Energy Flow in Ecosystems starts at 7 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Energy Flow in Ecosystems.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
Define the term 'trophic level'.
Describe how energy flow in an ecosystem is different from the flow of matter.
Describe the difference between gross primary productivity (GPP) and net primary productivity (NPP).
Describe the role of sunlight in the energy flow of an ecosystem.
Describe what happens to the energy that is not transferred to the next trophic level.
Explain the difference between a food chain and a food web.
Explain why carnivores are usually fewer in number than herbivores in an ecosystem.
Explain why energy flow in an ecosystem is considered to be inefficient.
Explain why food chains rarely have more than four or five trophic levels.
Explain why the biomass of producers is usually greater than that of consumers in an ecosystem.
If a tertiary consumer receives 10 kJ of energy, how much energy was present at the producer level, assuming 10% energy transfer at each level?
In a forest ecosystem, if the net primary productivity is 2,000 kJ/m²/year and plant respiration is 500 kJ/m²/year, what is the gross primary productivity?
In a grassland ecosystem, if the producers have 10,000 kJ of energy, how much energy would you expect to be available to the primary consumers?
What is meant by the term 'ecological pyramid'?
What is the role of primary consumers in an ecosystem?
What is the typical percentage of energy transferred from one trophic level to the next in an ecosystem?
