Living things that make their own food.

An environment that meets the needs of an organism.

Groups of living things and the environments they live in.

Nonliving things that help sustain life in an ecosystem.

Living things that make up an ecosystem.

Shows one pathway for food energy from organism to organism.

Feeds on the waste of plants and animals or on their remains after they die.

All the populations living in the same area.

Shows how several food chains connect and overlap.

Eats plants and animals.

Eats only plants.

A group of the same species living in the same place at the same time.

Eat other living things for energy.