1. Abiotic vs. Biotic
SPI Identify the biotic and abiotic elements of the major biomes.

2. Introduction
An ecosystem is a community of living organisms, in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows.

3. Check for Understanding
What is the definition of an ecosystem?
What two factors in an ecosystem are linked together?

4. Answers
An ecosystem is a community of living organisms, together with the nonliving components of their environment, interacting as a system.
These biotic and abiotic components are linked together.

5. Definitions
Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere.
Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction. Ask yourself if it is made out of cells…

6. Check for Understanding
What is the definition of an abiotic factor in an ecosystem?
What is the definition of a biotic factor in an ecosystem?

7. Answers
Abiotic factors refer to non-living physical and chemical elements in the ecosystem.
Biotic factors are living or once-living organisms in the ecosystem.

8. Examples

9. Check for Understanding
What was one example of a biotic factor on the last slide?
What was an example of an abiotic factor on the last slide?

10. Answers Biotic- people, animals, and plants
Abiotic- rocks, water, air, wind, temperature, light

11. Video Clips
Informational Video (2:39) yTN4
Music Video (3:45) Q3e8g

12. Practice Is it A (for Abiotic) or B (for Biotic)? The lake A fish
A boat
Algae
Sunlight
Cotton Tshirt
Turkey Sandwhich on Wheat Bread
Sunscreen

13. Answers Lake- A Fish- B Boat- A Algae- B (Protist- not Plant)
Sunlight-A
Cotton Tshirt – B
Turkey Sandwhich on Wheat Bread- B
Sunscreen- A (minerals or chemicals)

14. How About Harder Questions???
Name abiotic factors in a desert biome.
Name biotic factors in a tundra.

15. Abiotic Factors in Desert
Sand
Rocks
Hot temperatures during the day
Cold temperatures at night
Dry, Very little Water
Wind
Poor soil
Air
Elevation

16. Biotic Factors in Tundra
Artic Fox
Artic Hare
Artic Willow
Grass
Mosses
Lichens
Lemmings
Caribou
Muskox
Polar Bear
Snowy Owl

17. The Hardest question ever…
What are some biotic and abiotic factors in our classroom ecosystem???

18. Review
Define Biotic factors.
Define Abiotic factors.

19. TCAP Practice Question 1

20. Answer C

21. TCAP Practice Question 2

22. Answer B

23. TCAP Practice Question 3

24. Answer C

25. TCAP Practice Question 4

26. Answer A