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.

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

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.

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.

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

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.

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

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

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

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.