Exploring Food Chains and Webs

What is a food chain?

• A series of events in which one organism eats another and obtains energy

• A network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem

• A group of organisms that produce their own food

• A type of habitat where organisms live

Which of the following is an example of an autotroph?

• Lion

• Grass

• Eagle

• Rabbit

What role do autotrophs play in a food chain?

• They are primary consumers

• They are secondary consumers

• They are producers

• They are decomposers

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

• To produce energy from sunlight

• To eat primary consumers

• To decompose dead organisms

• To eat tertiary consumers

What is the role of tertiary consumers in an ecosystem?

• They are at the top of the food chain and eat secondary consumers

• They produce their own food

• They decompose organic material

• They are primary consumers

How does energy flow in an ecosystem?

• From tertiary consumers to producers

• From producers to consumers

• From decomposers to producers

• From consumers to producers

Which of the following best describes a food web?

• A single linear path of energy flow

• A complex network of interconnected food chains

• A group of organisms that live in the same habitat

• A cycle of water through the environment

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

• It increases

• It decreases

• It remains the same

• It disappears

Which of the following organisms is likely to be at the top of a food chain?

• Grass

• Rabbit

• Lion

• Deer

What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Ocean

• The Wind