step in a food chain or food web

Precipitation is average or low. Flat areas to grow things. Grass is more abundant than trees.

Low rainfall. Temperatures can get very hot during the day yet go below freezing at night.

Receives the most rainfall yearly. Most diverse species found here. Warm and humid

May have rainy seasons. Tall grasses are found here. Large predators like lions are found here.

Mild winters and warm or moderate summers. Plenty of rainfall. Primarily has hardwood trees that drop leaves in winter

Cold winters and mild summers. Forest of evergreens is the most abundant plant found

Cold, long winters and cool summers. The soil remains frozen in a state called permafrost

top predator that has to consume the most food to obtain energy

provides the greatest impact on determining the biome of the world

what moves between the environment and living things

first species to populate an area during succession; lichen are an example

Orderly, natural progression in a community over time

A species whose numbers are so small that the species is at risk of extinction

A term that typically describes a species that no longer has any known living individuals.

the variety of life in the world or in a particular habitat or ecosystem.

process of converting nitrogen gas into nitrogen compounds that plants can absorb and use

Any form of water that falls from clouds and reaches Earth's surface.

The change from a gas to a liquid

The change of a substance from a liquid to a gas

The continual movement of water among Earth's atmosphere, oceans, and land surface through evaporation, condensation, and precipitation

A group of ecosystems with similar climates and organisms

Overall weather in an area over a long period of time

Shows the amount of energy that moves from one feeding level to another in a food web

A community of organisms where there are several interrelated food chains

series of steps in an ecosystem in which organisms transfer energy by eating and being eaten

organism that breaks down and obtains energy from dead organic matter

organism that obtains energy by eating both plants and animals

organism that obtains energy by eating animals

An organism that eats only plants

animal that consumes the carcasses of other animals

An organism that obtains energy by feeding on other organisms

An organism that can make its own food.

An organism on which a parasite lives.

An organism that lives on or in a host and causes harm to the host

A relationship between two organisms of different species where one benefits and the other is harmed

A relationship between two organisms in which one organism benefits and the other is unaffected

symbiotic relationship in which both species benefit from the relationship

A relationship in which two different organisms live in close association with each other

an animal that is hunted and killed by another for food

An animal that hunts other animals for food

An interaction in which one organism kills another for food.

the struggle between organisms to survive in a habitat with limited resources

An organism's particular role in an ecosystem

A trait that helps an organism survive and reproduce

the largest population that an environment can support at any given time

An environmental factor that prevents a population from increasing

The number of individuals in an area of a specific size

the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

A biological community of interacting organisms and their physical environment.

Conversion of light energy from the sun into chemical energy.

All the different populations that live together in an area

group of individuals of the same species that live in the same area

A group of similar organisms that can breed and produce fertile offspring.

A nonliving part of an organism's habitat.

Any living part of the environment with which an organism might interact

the natural home or environment of an animal, plant, or other organism.