1. Chapter 5
How ecosystems work

2. Section1: Energy Flow in Ecosystems
Use sunlight in photosynthesis
Plants, algae, and some bacteria capture solar energy
Make carbohydrates (energy + H2O + CO2)
Used by organism and transferred when eaten
Used to move, grow, digest, and reproduce *
Life Depends on the Sun

3. Section1: Energy Flow in Ecosystems
Producer makes own food = autotrophic
Consumer gathers energy from other organisms = heterotrophic *
Producers to Consumers

4. Section1: Energy Flow in Ecosystems
In a Hydrothermal Vent (opening under ocean floor)
No sunlight; no photosynthesis; bottom of ocean
Bacteria make food from hydrogen sulfides escaping from mantle
Ecosystem built from these autotrophs *
Exception to the Rule

5. Section1: Energy Flow in Ecosystems
Class Chart *
What Eats What?

6. Section1: Energy Flow in Ecosystems
Opposite of photosynthesis
Breaking down food using Oxygen
Excess energy is stored *
Cellular Respiration

7. Section1: Energy Flow in Ecosystems
Marsh Mallow Lab
Why is a pyramid used?
What do primary, secondary, and tertiary mean?
Why does only 10% transfer? *
Energy Transfers