Energy Transfer and Trophic Levels

Jazmin introduces the concept of food webs, explaining the difference between food chains and food webs. She illustrates how various organisms are interconnected through a food web, detailing the roles of primary producers, consumers, and decomposers. The video also covers energy transfer within food webs, highlighting how energy diminishes at each level due to heat and waste. Jazmin encourages viewers to create their own food webs to understand these connections better.

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

• A food chain is a single pathway of energy flow, while a food web is a complex network of interconnected food chains.

• A food chain is a diagram, while a food web is a written description.

• A food chain includes only plants, while a food web includes animals.

• A food chain is found in the ocean, while a food web is found on land.

Which of the following is an example of a primary producer?

• Hawk

• Rabbit

• Carrot

• Snake

What type of organisms are primary consumers?

• Omnivores

• Herbivores

• Carnivores

• Decomposers

Which organism is an example of a secondary consumer?

• Rabbit

• Hawk

• Carrot

• Snake

What is the role of a tertiary consumer in a food web?

• They decompose dead matter.

• They produce energy from sunlight.

• They eat primary producers.

• They consume secondary consumers.

What is the primary function of decomposers in an ecosystem?

• To produce oxygen

• To provide shelter for animals

• To break down waste and dead matter

• To consume primary producers

Which of the following is NOT a decomposer?

• Bacteria

• Hawk

• Fungi

• Worms

What percentage of energy is typically transferred from one trophic level to the next in a food web?

• 100%

• 50%

• 1%

• 10%

Why is there less energy available at higher trophic levels in a food web?

• Higher levels do not consume any energy.

• Energy is stored indefinitely at lower levels.

• Energy is only transferred upwards once.

• Energy is lost as heat and waste at each level.

What limits the number of trophic levels in a food web?

• The amount of sunlight available

• The number of primary producers

• The amount of energy available at each level

• The size of the ecosystem