The study of organisms and the environments they live in, including every factor that might affect those organisms.

Literal translation=Ball of life. Extends to any place that life of any kind might exist on planet Earth.

The SOLID surface layer of planet Earth.

The world of water that surrounds all of us. The areas of the Earth's surface that is covered by water.

A general ecosystem type. A large area on Earth's surface that is defined by the types of plants, animals, and the climate that exists there.

Specific areas of biological activity including all living and nonliving things (or factors) within the area.

A transition zone between two biomes that include living and nonliving factors from both biomes.

A place where an organism lives that meets all the needs the organism requires to survive.

Series of events that happen when one organism consumes another to survive.

The beginning of a simple food chain.

The next link in a food chain.

Plant eaters. The herbivores of a food chain or food web.

The organisms that eat the primary consumers. They are carnivores.

The consumers that eat the primary and secondary consumers.

Organisms that eat ONLY plants.

Consumers that eat ONLY meat.

Organisms that eat both plants and animals.

A place being too hot, too cold, not having enough oxygen.

Competitive for mainly for food or possibly shelter.

A mountain range, desert, or a body of water.