An ecosystem is a community of living things that interact with each other and their physical environment. It can include biotic factors like plants, animals, and other organisms, as well as abiotic factors such as air, water, soil, and sunlight. The balance of interactions between these biotic and abiotic components is important for maintaining a viable ecosystem. Examples of ecosystems include deserts, rainforests, oceans, and grasslands.

2. What is an Ecosystem?
 An ecosystem is a community of living
things that interact with each other and
with the physical world.

3. What is an Ecosystem?
 The ecosystem is the 4th Level of Biological
Organization.

4.  The plants and animals within each
ecosystem interact with each other and the
non-living elements of the ecosystem, such
as the sun, air, water and soil.

5. Interactions between Biotic and Abiotic Factors

6.  An ecosystem can be very small such as a
puddle or under a rock.
 It can also be as big as an ocean or a
desert.

7.  The balance of an ecosystem is important. All
things must work together to provide a good
living environment.
 For example, if there is not enough water,
plants and animals will die and the
ecosystem will not exist.

8. Examples of Ecosystems
 Desert
 Artic Tundra
 Rainforest
 Ocean
 African Savanna
 Swamp

9. Producers
 A living thing that can make its own food.
 Examples: Plants, Trees, Flowers

10. Consumers
 A living thing that gets its food from eating
other living things.
 Example: Polar bear eating a fish. A bird
eating a berry. A zebra eating grass.

11. Decomposers
 A living thing that breaks down other living
things to get nutrients and energy.
 Examples: Vultures eat dead animals.
Worms and beetles eat dead decaying
plants.

12. Population
 A group of living things that live in the
same place at the same time.
 Example: many penguins live in the artic;
many elephants live in the African Savanna

13. Community
 When different populations live together in
the same habitat and interact with each
other.
 Example: Elephants, giraffes, and zebras
all live together in the Savanna.

14. Abiotic
 Any non-living organisms in an ecosystem.

15. Biotic
 Any living organisms in an ecosystem.

16. Food Chain
 Shows what eats what in an ecosystem.
 Example: