Ecosystems

A system made up of organisms interacting with one another

• biology
• abiotic
• biotic
• ecosystem

Nonliving things found in an ecosystem.

• factories
• factor trees
• biotic factors
• abiotic factors

Ecosystems are always______.

• always changing
• always balanced
• never changing
• never balanced

Organisms that make up the living part of an ecosystem.

• abiotic
• biotic factors
• ecology
• ecosystems

An individual living thing is a/an __________.

• habitat
• ecosystem
• organism
• population

A group of the same type of organisms living in the same place at the same time.

• threatened species
• populations
• community
• limiting factor

Which statement is correct?

• A population is the same as a community
• A community is a group of populations
• A community is a part of a population
• A population is a group of communities

Which best explains why many kinds of plants and animals can live together in an ecosystem?

• The plants and animals are all part of a food chain and depend on each other to live.
• Plants and animals are interdependent of one another.
• One species may overpopulate, killing all plant life.
• Over population of a species results in a biodiversity.

The place where an organism lives is its _________.

• habitat
• abiotic
• ecosystem
• community

Which is a biotic factor?

• sunlight
• air 
• bacteria
• all of the above