Transcript Ch 3 The Biosphere

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.
CH 3 THE BIOSPHERE
3.2 Energy, Producers, and Consumers
Primary Producers
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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
 Oxygen
 Water
 Food
 Carbon
Dioxide
(sugar).
Photosynthesis Steps

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“Plant” absorbs light energy and takes in CO2 and
H2 O
“Plant” releases O2 and makes sugar (glucose
C6H12O6)
CO2 + H2O + Light Energy -> O2 + C6H12O6
6CO2 + 6H2O + Light Energy -> 6O2 + C6H12O6.
Chemosynthesis

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Use of chemical energy to produce carbohydrates
Harness chemical energy from inorganic molecules
Often found in deep sea ecosystems.
Consumers
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Organisms that can not make food; need to eat or
consume food
Heterotrophs.
Consumers

Carnivores
 Kill

Herbivore
 Eat

and eat other animals
only plant material
Omnivore
 Eats
both plant and animal.
Consumers

Scavengers
 Eats

the flesh of animals they did not kill
Decomposers
 Feed

by chemically breaking down organic matter
Detritivores
 Feed
on detritus particles and decomposers.