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WorksheetsEcosystem Energy Flow 2/20/24
Total questions: 10
Worksheet time: 5mins
Which of the following best describes how energy is transferred in an ecosystem?
Energy is recycled at each trophic level.
Energy flows in a linear path from the sun to producers and then to various consumers.
Energy is primarily transferred through the water cycle.
Energy flows from decomposers directly to producers and then to consumers.
What is the role of phytoplankton in an aquatic ecosystem?
They are primary consumers.
They decompose organic matter.
They serve as the primary producers.
They regulate water temperature.
In a food web, which trophic level is directly above primary consumers?
Secondary consumers
Tertiary consumers
Primary producers
Decomposers
What does an ecological pyramid represent?
The number of organisms at each trophic level.
The biomass at each trophic level.
Both the number of organisms and the biomass at each trophic level.
The amount of water consumed by each trophic level.
Why is energy transfer between trophic levels not 100% efficient?
Because some energy is always lost as heat.
Because consumers utilize all the energy they consume.
Because producers absorb all the sunlight.
Because decomposers release energy back into the ecosystem.
What is biomass?
The total mass of living matter within a given unit of environmental area.
The amount of water in an ecosystem.
The total number of species in an ecosystem.
The amount of sunlight an area receives.
How do ecological pyramids help in analyzing energy flow through trophic levels?
By showing the movement of water through trophic levels.
By illustrating the loss of energy at each trophic level.
By displaying the genetic diversity at each trophic level.
By measuring the amount of sunlight absorbed by each trophic level.
Which of the following is a characteristic feature of a food web?
It shows a single pathway of energy flow.
It includes only primary producers and primary consumers.
It illustrates multiple pathways through which energy and nutrients can flow.
It represents the amount of biomass at each trophic level.
What percentage of energy is typically transferred from one trophic level to the next?
10%
25%
50%
75%
Why are there fewer tertiary consumers than primary consumers in an ecosystem?
Because tertiary consumers require more energy for survival.
Because there is less energy available at the higher trophic levels.
Because primary consumers reproduce more quickly.
Because tertiary consumers have no natural predators.
