Exploring Food Chains, Webs, and Pyramids

The video explains how the Sun provides energy to ecosystems, which flows through producers, consumers, and decomposers. It covers the roles of these organisms in food chains, webs, and pyramids, highlighting energy transfer and loss between trophic levels. The video also discusses different ways to represent these relationships, including food chains, webs, and pyramids, and the concept of trophic levels.

What is the primary source of energy for ecosystems?

• Wind

• The Moon

• The Sun

• Volcanoes

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Which organisms are considered producers in an ecosystem?

• Fungi

• Plants and photosynthesizing bacteria

• Carnivores

• Herbivores

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What do primary consumers primarily eat?

• Decomposers

• Secondary consumers

• Producers

• Tertiary consumers

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Which of the following is an apex predator?

• Primary consumer

• Secondary consumer

• Decomposer

• Tertiary consumer

What is the main role of decomposers in an ecosystem?

• Photosynthesis

• Consuming primary consumers

• Breaking down organic matter

• Producing energy

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What percentage of energy is typically transferred from one trophic level to the next?

• 1%

• 50%

• 10%

• 25%

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What limits the size of a food chain?

• The number of consumers

• The amount of energy lost between trophic levels

• The number of decomposers

• The number of producers

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What is a food chain?

• A representation of energy flow in an ecosystem

• A complex network of feeding relationships

• A linear sequence of organisms where each is eaten by the next

• A pyramid showing biomass

Who was the first to represent the concept of a food web?

• Albert Einstein

• Isaac Newton

• Charles Elton

• Charles Darwin

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What does a food pyramid represent?

• All of the above

• The energy transfer rate between trophic levels

• The number of organisms at each trophic level

• The biomass or biofuel activity at each trophic level

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