1. Starter
Name 3 abiotic factors and 3 biotic factors in the ecosystem on the right.
What makes up an ecosystem?

2. Food Chains & Food Webs
Ecology

3. Objective
I can arrange components (parts) of a food chain and food web according to energy flow.

4. What is the source of energy for your body?

5. The sun is the original source of energy for life on our planet

6. Energy Organisms are classified by how they obtain energy: Producers
Consumers

7. Producers
Producer: organisms that can capture energy from sunlight or chemicals and use it to produce food from inorganic compounds
Producers are also known as Autotrophs
They are the foundation of all ecosystems because they make energy available for all other organisms in the ecosystem
Because they produce food in the ecosystem they are called primary producers

8. Types of Producers Energy from the Sun Without Light
Autotrophs that use solar energy
Photosynthesis: process plants and other organisms use light energy to convert water and carbon dioxide into oxygen and carbohydrates
Autotrophs that produce food from inorganic molecules
Chemosynthesis: process organisms such as some bacteria that use chemical energy to produce carbohydrates

9. Consumers
Heterotroph: an organism that gets its energy by consuming other organisms
Because they consume other organisms in the ecosystem they are called consumers
There are 5 types of heterotrophs

10. 1. Herbivore Herbivore: a heterotroph that eats only plants
Examples - cow, rabbit, grasshopper

11. 2. Carnivore Carnivore: a heterotroph that preys on other heterotrophs
Examples – wolves, lions

12. 3. Omnivore Omnivore: an organism that eats both plants and animals
Examples – bears, humans, mockingbirds

13. 4. Detritivore
Detritivores: consume fragments of dead matter and return nutrients to the soil, air, and water
Examples – worms, insects

14. 5. Decomposers
Decomposers: organisms that break down and obtain energy from dead organic matter
Examples - fungi and bacteria

15. Which is better?
Autotroph
Heterotroph

16. Feeding Relationships
Energy flows through an ecosystem in one direction, from the sun or inorganic compounds to autotrophs (producers) and then to various heterotrophs (consumers).

17. Feeding Relationships
The relationship between producers and consumers connect organisms into feeding networks based on who eats whom.

18. Feeding Networks
Food Chain: a simple model that shows how energy flows through an ecosystem
In a food chain some organisms create the energy (producers) and some organisms use the energy (consumers)

19. Feeding Networks
Feeding relationships are complex with most organisms feeding on more than one species
Food Web: a model representing the many interconnected food chains within an ecosystem

20. Trophic Levels Trophic Level: each step in a food chain or food web
Autotrophs make up the first trophic level in all ecosystems
Organisms at each trophic level get their energy from the trophic level before it
The arrow points to the eater and shows the transfer of energy

21. Does a food chain have an end?

22. Does a food chain have an end?