The parts of the Earth and the surrounding atmosphere where there is life.

A living thing, as an animal or plant, that influences or affects an ecosystem.

All the organisms of the same species that live in the same area at the same time.

A specific environment where an organism lives and survives.

The non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Organisms that get energy from the environment, such as sunlight, and make their own food.

The role and position a species has in its environment in order to survive.

A network of food chains by which energy and nutrients are passed on from one living organism to another.

Organisms that get energy by eating other organisms.

A model that shows the flow of energy from one feeding level to the next in an ecosystem.

A long-term relationship between two species that usually involves an exchange of food or energy.

A single pathway in which energy is passed on when one organism eats another organism.

Relationship between two organisms of different species in which one individual benefit and the other is unaffected.

Relationship between two organisms of different species in which each individual benefit from the activity of the other.

Relationship between two organisms of different species in which one organism causes harm to another by living in or on it.

All living and non-living parts of the environment in a specific area.