(1)
SOL LS 6c photosynthesis is the foundation of
virtually all food webs
SOL LS 8 (a) relationships among producers,
consumers, and decomposers in food webs
(b) the relationship between predators and prey
(1)
Photosynthesis- 6CO₂ + 6H₂O + SUN → C₆H₁₂O₆ + 6O₂
Producer- make their own food for energy
Consumer- eat other organisms to get energy
Respiration- C₆H₁₂O₆ + 6O₂ → 6H₂O + 6CO₂ + ATP
Decomposer- break down dead organic material for
energy
(3)
How do we obtain carbon, water, and nitrogen?
The water, carbon, nitrogen cycles
are important because they help us to get
components we need for energy.
Where does our energy originally come from? We can trace it all the way back
to…
THE SUN!!
Photosynthesis is the FOUNDATION OF ALL FOOD CHAINS AND WEBS!
CO2 + H2O
 C6H12O6
+ O2
Carbon dioxide + water  sugar (glucose)+ oxygen
(4)
What is a chain?
A chain is a series of
objects connected to
each other
(4)
Definition?
A food chain is the
sequence from a food
source to the final
consumer
(6)
What is a web?
•Woven or interwoven
pattern
•Complicated relationship
(7)
What is a food web?
Definition: all of the interrelated food chains
in an ecological community.
http://eco-ref.org/Images/img887971.gif
(5)
• Arrows always show the transfer of ENERGY
• The arrow points to the stomach where
the food ends up (the consumer)
(8)
Tertiary Consumers
Carnivores
Get energy from secondary consumers
Secondary Consumers
Carnivores
Get energy from primary consumers
Primary Consumers
Herbivores
Get energy from producers
Producers
Get energy from
the sun
Why should you eat your fruits and vegetables?
What gives you more energy - eating vegetation or
eating meat? Why?
(9)
Why is cow dung a
better fuel than lion
dung?
100%
10%
1%
0.1%
A LOT of Energy is lost when
you transfer the energy from
one level to the next – as
much as 90% or more for each
transfer!
• https://www.brainpop.com/search/?keyword
=Food+Chains
• https://www.brainpop.com/science/energy/e
nergypyramid/
• https://www.youtube.com/watch?v=MuKs9o1
s8h8
(7)
Pick a food chain out of the web below.. Identify
producers, primary, secondary, tertiary, quaternary
consumers…
http://eco-ref.org/Images/img887971.gif