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Living Things and the Environment. Key Words. Habitat Biotic Factors Abiotic Factors Populations Species Community Single Organism Ecology. Habitats. Organisms live in a specific place within an ecosystem.

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key words
Key Words


Biotic Factors

Abiotic Factors




Single Organism



Organisms live in a specific place within an ecosystem.

An organism obtains food, water, shelter, and other things it needs to live, grow and reproduce from its surroundings.

This place is known as a habitat.

habitat example
Habitat Example

Single ecosystems may contain manyhabitats.

In a forest ecosystem, mushrooms grow in the damp soil, rabbits live on the forest floor, and termites live under the bark of tree trunks

Organisms live in different habitats within the ecosystem.

biotic factors
Biotic Factors

Organism interacts with both the living an non-living things in its environment.

The living parts of an ecosystem are called

biotic factors.

Grass, plants, hawks, eagles, worms, fungi, bacteria – biotic factors

abiotic factor
Abiotic Factor

Non-living parts of an ecosystem

Affect living things

Abiotic Factors Are:







A species is a group of organisms that are physically similar and can reproduce with each other to produce fertile offspring.

All species within a particular area are referred to as a population.


All the pigeons in New York City

all the daises in a field


You can not use all the trees in a forest

there are different species of trees

Areas for population can be as small as a single blade of grass to as big as the entire planet.

Populations can move from place to place. Blue fin whales will move to different parts of the ocean.


Ecosystems contain more than one type of organism

All the different populations that live together in an area make up a community

To be considered a community the organismsmust live together and interact with each other.

They may interact by using the same types of shelter, food, or resources.

level of organization
Level of Organization

Smallest unit: living organism

Next: Population of species

Then: Populations of different species

live together in community

Finally: The community and the abiotic

factors together in ecosystem


Demonstrate Your Understanding

Use the paper plate given to

Create Levels of organization

Based upon the illustration.