Exploring Food Chains and Food Webs

The video tutorial explains how energy flows in an ecosystem through an energy pyramid, highlighting the roles of producers, consumers, and decomposers. It describes the food chain, starting with energy from the sun, and how it progresses through producers and consumers. Decomposers play a crucial role in recycling matter. The concept of a food web is introduced, showing the interconnectedness of various food chains and the impact of changes within the ecosystem.

What does the base of the energy pyramid represent?

• Sunlight

• Decomposers

• Consumers

• Producers

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How is energy transferred from one organism to another in an ecosystem?

• Through water

• By consuming each other

• Via sunlight

• Through air

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What role do plants play in the food chain?

• Predators

• Producers

• Consumers

• Decomposers

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Which of the following is an example of a food chain?

• Plants, fungi, bacteria

• Sun, plants, deer, mountain lion

• Deer, plants, sun

• Sun, deer, mountain lion

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Which organisms are responsible for breaking down dead material?

• Sunlight

• Consumers

• Producers

• Decomposers

What do decomposers return to the environment?

• Oxygen

• Water vapor

• Carbon dioxide

• Nutrients

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What is a food web?

• A collection of decomposers

• A group of producers

• A system of overlapping food chains

• A single food chain

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How does a change in one part of a food web affect the ecosystem?

• It has no effect

• It affects only one species

• It can affect all parts

• It changes the climate

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What do all living things depend on for survival?

• Sunlight

• Water and air

• Other living things

• Soil nutrients

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