What does the base of the energy pyramid represent?

• Sunlight

• Decomposers

• Consumers

• Producers

How is energy transferred from one organism to another in an ecosystem?

• Through water

• By consuming each other

• Via sunlight

• Through air

What role do plants play in the food chain?

• Predators

• Producers

• Consumers

• Decomposers

Which of the following is an example of a food chain?

• Plants, fungi, bacteria

• Sun, plants, deer, mountain lion

• Deer, plants, sun

• Sun, deer, mountain lion

Which organisms are responsible for breaking down dead material?

• Sunlight

• Consumers

• Producers

• Decomposers

What do decomposers return to the environment?

• Oxygen

• Water vapor

• Carbon dioxide

• Nutrients

What is a food web?

• A collection of decomposers

• A group of producers

• A system of overlapping food chains

• A single food chain

How does a change in one part of a food web affect the ecosystem?

• It has no effect

• It affects only one species

• It can affect all parts

• It changes the climate

What do all living things depend on for survival?

• Sunlight

• Water and air

• Other living things

• Soil nutrients