Energy Transfer in Food Chains

The video tutorial explains the concepts of food chains and food webs, illustrating how energy is transferred between different organisms. It provides an example of a food chain involving a plant, mouse, eagle, crocodile, and a man, highlighting the roles of primary, secondary, and tertiary consumers. The video also discusses the complexity of food webs and introduces the energy pyramid, explaining how energy diminishes as it moves up the food chain. The tutorial concludes with a summary of the key points covered.

What is the primary role of a food chain?

• To explain the life cycle of plants

• To demonstrate how energy is transferred between organisms

• To illustrate the diet of humans

• To show the habitat of animals

In the given food chain example, which organism is the primary producer?

• Mouse

• Eagle

• Crocodile

• Plant

Who is the tertiary consumer in the food chain example?

• Human

• Crocodile

• Eagle

• Mouse

What happens to the energy as it moves up the food chain?

• It increases

• It decreases

• It doubles

• It remains the same

What is a food web?

• A diagram of animal habitats

• A network of interconnected food chains

• A list of plant species

• A single food chain

Which of the following can be part of a food web?

• Only microorganisms

• Only animals

• Both plants and animals

• Only plants

How much energy is typically lost when it is transferred from one trophic level to the next?

• 100%

• 90%

• 50%

• 10%

If a plant receives 1000 units of energy from the sun, how much energy does a giraffe get after eating the plant?

• 1000 units

• 900 units

• 10 units

• 100 units

What is the purpose of an energy pyramid?

• To show the number of organisms at each level

• To illustrate the energy available at each trophic level

• To display the size of organisms

• To map the geographical distribution of species

What is the main takeaway from the video about food chains and food webs?

• Only animals are part of food chains

• Energy transfer is inefficient, and ecosystems are interconnected

• Food chains are isolated systems

• Energy is unlimited in ecosystems