Energy Flow

What is an ecosystem?

• All living and nonliving things that interact in an area

• All of the physical characteristics of an area

• All the living things that interact in an area

• All of the nonliving things that interact in an area

What is the original source of energy for organisms in a food chain?

• Plants

• Animals

• Sunlight

• Consumers

Which is the best definition of a food chain?

• A model of consumers providing energy to producers.

• A method for growing plants without soil.

• A process by which plants make food from energy in sunlight.

• A path by which energy flows from one living thing to another.

In the food chain below, which organism is the producer?

Grass --> Mouse --> Snake --> Hawk

• Grass

• Mouse

• Snake

• Hawk

Which organisms make their own food?

• Producers

• Consumers

• Decomposers

Which organisms obtain energy by eating other living organisms?

• Producers

• Consumers

• Decomposers

Which organisms break down wastes and dead organisms and return the raw materials to the environment?

• Producers

• Consumers

• Decomposers

Which of the following is the LOWEST trophic level in the pyramid?

• Primary Consumer

• Producer

• Tertiary Consumer

• Herbivore

How much energy gets transferred from one trophic level to the next?

• 50%

• 25%

• 10%

• 100%

Which trophic level has the HIGHEST population (population = the number of organisms)?

• Apex Predator

• Producer

• Herbivore

• Omnivore