Transcript 3-2 Energy Flow - cloudfront.net

3-2 Energy Flow
Page 67
A. Producers
• 1. Sunlight is the main source of energy for life
on earth.
• 2. Energy gets transferred from producers, or
autotrophs (make their food).
A. Producers
• 3. Organisms use sunlight to make sugar by
the process of photosynthesis.
A. Producers
• 4. An exception are the organisms living in the
deep ocean where light does not reach.
A. Producers
• 5. When organisms use chemical energy to
produce carbohydrates, the process is called
chemosynthesis.
A. Producers
• 6. Deep-ocean communities get energy from
consuming bacteria (they use hydrogen sulfide
to make food).
video
B. Consumers
• 1. Consumers, or heterotrophs, eat other
organisms.
B. Consumers
• 2. Herbivores eat plants.
B. Consumers
• 3. Carnivores eat other animals.
B. Consumers
• 4. Omnivores
eat both plants
and animals.
B. Consumers
• 5. Decomposers break down dead organisms
(include bacteria and fungi).
B. Consumers
• 6. Detritivores feed on dead matter (detritus)
such as plant and animal remains.
– Ex: mites, earthworms, snails
Brainstorm (2 of each)
•
•
•
•
Herbivore
Carnivore
Omnivore
Decomposer
C. Feeding Relationships
• 1. When organisms consume each other,
energy is transferred.
C. Feeding Relationships
• 2. A food chain is the path of energy transfer
from one organism to the next as it is
consumed.
Organize: Start with organism that is at the
top of the food chain then move down!
• Organisms: Tiger, Grass, Rabbit, Wolf, Fox
• Labels: Producer, Autotroph, Heterotroph,
First Consumer, Secondary Consumer, Tertiary
Consumer(Top Carnivore)
Quick Activity!
• Each paper has the name of an organism. Find
3 other people to form a food chain with!
• When you complete your group of 4, Find a
table to sit down at.
C. Feeding Relationships
• 3. A food web includes more organisms than a
food chain and shows their feeding
relationships.
Quick Activity!
• Food Web!
• Using the same cards lets make a class food
web using yarn!
• Start with the sun, move to plants, move to
herbivores, finish with carnivores!
C. Feeding Relationships
• 4. Each step of energy transfer is called a
trophic level.
C. Feeding Relationships
• 5. Ecological or Energy pyramids visualize the
loss of energy between trophic levels.
C. Feeding Relationships
• 6. Only 10% of the available energy is able to
pass to the next trophic level, the other 90% is
lost as heat.
Quick Demo!
• Energy Loss!
C. Feeding Relationships
• 7. The total amount of
living tissue within a
given trophic level is
called biomass.
Project:
• Make an energy pyramid