Exploring Food Chains and Food Webs in Ecosystems

The video tutorial explains the concept of energy transfer in ecosystems, starting with the sun as the primary energy source. It covers the basics of food chains, highlighting the roles of producers, consumers, and decomposers. The tutorial provides examples of food chains and food webs, illustrating how energy flows through different organisms. It also discusses the nutrient cycle and the importance of decomposers in recycling nutrients back into the ecosystem.

What is the primary source of energy for all life on Earth?

• The Moon

• The Sun

• Wind

• Electricity

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What type of organisms are known as producers?

• Herbivores

• Autotrophs

• Carnivores

• Consumers

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Which consumer is directly involved after the producer in a food chain?

• Tertiary consumer

• Quaternary consumer

• Secondary consumer

• Primary consumer

What do animals that cannot produce their own food consume to get energy?

• Water

• Plants or other animals

• Soil

• Sunlight

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What is the apex predator in the described food chain?

• Bear

• Honeybee

• Skunk

• Flower

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What role do decomposers play in the ecosystem?

• Prey on secondary consumers

• Break down dead material

• Consume primary producers

• Produce food

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Which of the following is not a decomposer?

• Worm

• Mushroom

• Wolf

• Bacteria

What does a food web illustrate?

• Water cycle

• Energy transfer in an ecosystem

• Energy storage

• Single food chain

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Which ecosystem was mentioned as having a complex food web?

• Desert

• Forest

• Ocean

• Mountain

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Which of the following is a primary consumer in a marine food web?

• Sea otter

• Fish

• Seaweed

• Sea urchin

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