Understanding Food Webs and Energy Flow

What is the primary source of energy for plants?

• Water

• Soil

• Sunlight

• Air

Which of the following is a primary consumer?

• Hawk

• Snake

• Rabbit

• Tiger

What is the role of secondary consumers in a food chain?

• They consume primary consumers.

• They decompose dead organisms.

• They eat primary producers.

• They produce energy from the sun.

How do omnivores fit into food webs?

• They only eat plants.

• They only eat animals.

• They eat both plants and animals.

• They decompose dead matter.

What happens to energy from dead plants and animals?

• It is lost forever.

• It is recycled by decomposers.

• It is absorbed by the sun.

• It is stored in the soil.

Which organisms are responsible for recycling nutrients back into the soil?

• Primary producers

• Primary consumers

• Decomposers

• Tertiary consumers

What is a keystone species?

• A species that plays a critical role in maintaining the structure of an ecosystem.

• A species that can be easily replaced.

• A species that is not important to its ecosystem.

• A species that only eats plants.

What could happen if a keystone species is removed from an ecosystem?

• The ecosystem remains unchanged.

• The ecosystem may collapse.

• The ecosystem will become more diverse.

• New species will immediately replace it.

Why are food webs important for conservation efforts?

• They show which species are not needed.

• They eliminate the need for conservation.

• They simplify the ecosystem.

• They help identify important species to protect.

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

• A food web only includes plants.

• A food web shows multiple pathways of energy flow.

• A food chain is more complex than a food web.

• A food chain includes decomposers.