1. Academic Science B Ms.Philavane
Energy Flow
Academic Science B
Ms.Philavane

2. What is the main source of energy for all living things?

3. Role of the Sun
Sunlight is the main source of energy for most life on earth.
Why do you think the sun is so important?
What would happen if
the sun disappeared?

4. Producers Use energy from the sun to produce their own food
Plant, algae and certain bacteria
Also known as autotrophs
What is the name of the process where light energy is converted to chemical energy?

5. Photosynthesis 6CO2 + 6H20 →Light C6H12O6 + 6O2
Energy from the sunlight is converted to sugar and oxygen.

6. Consumers Can all organisms use the sun to produce energy?
The only way for these organisms to obtain their energy is from consuming other organisms.
Animals, fungi, and certain bacteria
Also known as heterotrophs

7. Categories of Heterotrophs
Herbivore—obtain energy by only eating plants
Cows, deer, and caterpillars
Carnivore—eat other animals
Snakes, and wolf
Omnivore—eat both plants and animals
Humans and bears

8. Categories of Heterotrophs
Detritivore—eat dead plant and animals
Earthworms, crabs
Decomposers—break down dead, decaying matter
Bacteria, fungi

9. What is My Classification?

10. What is My Classification?

11. What is My Classification?

12. Food Chains
Model used to show how matter and energy move through an ecosystem.
Energy flows in one direction.
From the sun to autotrophs to heterotrophs and eventually to decomposers.
Series of steps where energy is transferred by eating and being eaten.
Amount of energy in the last transfer is only a portion of what was available in the first transfer.

14. Food Web Links all food chains in an ecosystem together.
Shows all possible feeding relationships in a community.
More realistic model because organisms depend on more than one organism to feed.