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Flashcards on Environmental Science: Ecosystems
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What is an ecosystem?
A dynamic system formed by the interaction of living organisms with their physical environment.
Name two abiotic components of an ecosystem.
Sunlight and soil
What is a trophic level in an ecosystem?
Each level in a food chain or food web where energy is transferred from one organism to another.
What is the role of decomposers in an ecosystem?
Decomposers break down dead organisms and recycle nutrients back into the ecosystem.
What is biodiversity?
The variety of species and ecosystems on Earth.
What is an ecological niche?
The role and position a species has in its environment.
What are primary consumers?
Organisms that eat producers (plants) for energy.
What is a keystone species?
A species that has a critical role in maintaining the structure and functioning of an ecosystem.
What is the water cycle?
The continuous movement of water on, above, and below the surface of the Earth.
What is the difference between a food chain and a food web?
A food chain shows the linear flow of energy from one organism to another, while a food web consists of interconnected food chains.
What is an invasive species?
A non-native species that causes harm to the environment, economy, or human health.
What is a producer?
An organism that can make its own food through photosynthesis or chemosynthesis.
What is ecological succession?
The gradual process of change and replacement of species in a community over time.
What is the role of apex predators in an ecosystem?
Apex predators regulate the population of other species and help maintain balance in the ecosystem.
What is the carbon cycle?
The movement of carbon through the Earth's atmosphere, land, oceans, and living organisms.
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Test Your Knowledge
What is the term for a dynamic system formed by the interaction of living organisms with their physical environment?
Ecosystem
Trophic level
Biodiversity
Ecological niche
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Which of the following is an abiotic component of an ecosystem?
Grass
Sunlight
Deer
Bacteria
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What is the role of decomposers in an ecosystem?
Produce oxygen
Break down dead organisms
Convert sunlight into energy
Prey on other organisms
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What is the term for the variety of species and ecosystems on Earth?
Biodiversity
Trophic level
Ecosystem
Ecological niche
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Which of the following is an example of a keystone species?
Dandelion
Squirrel
Beaver
Grasshopper
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How is a food chain different from a food web?
A food chain shows a linear flow of energy, while a food web consists of interconnected food chains
A food chain only includes producers, while a food web includes consumers
A food chain describes the water cycle, while a food web describes the carbon cycle
A food chain is a social hierarchy, while a food web is a social network
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What is the term for a non-native species that causes harm to the environment, economy, or human health?
Invasive species
Apex predator
Primary consumer
Decomposer
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What is the role of apex predators in an ecosystem?
Control the water cycle
Regulate trophic levels
Perform photosynthesis
Maintain balance in the ecosystem
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What is the term for the movement of carbon through the Earth's atmosphere, land, oceans, and living organisms?
Trophic level
Ecological succession
Carbon cycle
Invasive species
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Which of the following is an example of a producer?
Wolf
Oak tree
Bear
Rabbit
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