1. 1. Review- What are the two primary sources of energy the power living systems 2. Pose Questions- Propose a question that a scientist might ask about the variety of organisms found around deep sea vents 3. Build Vocab- the word autotroph comes from the Greek words autos, meaning “self,” and trophe, meaning “food or nourishment.” Knowing this, what do you think the Greek word heteros, as in heterotroph, means.

2. 3.2 Energy, Producers, and Consumers
Ch 3 The Biosphere
3.2 Energy, Producers, and Consumers

3. Primary Producers
Organisms that can make (produce) their own food- think plants
Plants, algae, and certain bacteria can capture energy from sunlight or chemicals and convert it into forms
Autotrophs
Sunlight is the ultimate energy source.

4. Photosynthesis Process of converting light energy into chemical energy
Chemical energy is the usable form of energy for living organisms
Ultimate source of energy for almost all living organisms
Plants, algae, and bacteria.

5. “Plant” Basics Needs: Produces: Light Water Carbon Dioxide Oxygen
Food (sugar).

6. Photosynthesis Steps
“Plant” absorbs light energy and takes in CO2 and H2O
“Plant” releases O2 and makes sugar (glucose C6H12O6)
CO2 + H2O + Light Energy -> O2 + C6H12O6
6CO2 + 6H2O + Light Energy -> 6O2 + C6H12O6.

7. Chemosynthesis Use of chemical energy to produce carbohydrates
Harness chemical energy from inorganic molecules
Often found in deep sea ecosystems.

8. Consumers
Organisms that can not make food; need to eat or consume food
Heterotrophs.

9. Consumers Carnivores Herbivore Omnivore Kill and eat other animals
Eat only plant material
Omnivore
Eats both plant and animal.

10. Consumers Scavengers Decomposers Detritivores
Eats the flesh of animals they did not kill
Decomposers
Feed by chemically breaking down organic matter
Detritivores
Feed on detritus particles and decomposers.