FOSS Living Systems Inv. 1 Part 2: Ecosystems and Energy Flow

What role do decomposers play in an ecosystem?

• They produce their own food through photosynthesis.

• They consume other organisms for energy.

• They break down dead material and waste, recycling nutrients.

• They serve as primary consumers in food chains

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Which of the following is an example of an abiotic factor in an ecosystem?

• Plants

• Animals

• Sunlight

• Bacteria

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In a food chain, what is the primary source of energy?

• Decomposers

• The Sun

• Carnivores

• Herbivores

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Which of the following best describes the flow of energy in an ecosystem?

• From producers to decomposers to consumers

• From consumers to producers to decomposers

• From producers to consumers to decomposers

• From decomposers to consumers to producers

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What is a producer in an ecosystem?

• An organism that eats other organisms for energy

• An organism that breaks down dead organisms for nutrients

• An organism that produces its own food through photosynthesis

• An organism that relies on the sun for energy

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Which of the following is a biotic interaction in an ecosystem?

• The effect of temperature on plant growth

• The consumption of rabbits by foxes

• The impact of rainfall on soil erosion

• The influence of sunlight on algae growth

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What is the role of consumers in an ecosystem?

• To produce energy through photosynthesis

• To break down dead organisms and recycle nutrients

• To eat other organisms for energy

• To provide oxygen for other organisms

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Which of the following best describes a food web?

• A linear sequence of who eats whom in an ecosystem

• A single pathway of energy flow from the sun to producers to consumers

• A complex network of feeding relationships among organisms in an ecosystem

• A diagram showing only the primary consumers and producers

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How do abiotic factors affect ecosystems?

• They provide energy for primary consumers

• They break down organic matter into nutrients

• They influence the types of organisms that can live in an ecosystem

• They consume other organisms for energy

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What is the difference between a food chain and a food web?

• A food chain is more complex and includes more organisms

• A food web shows only the primary producers and consumers

• A food chain shows a single pathway of energy flow, while a food web shows multiple pathways

• There is no difference; they are the same thing