Welcome to MooMooMath and ScienceAll 
living things need energy.
Some biotic factors get their energy from
the sun.
Others eat other biotic factors
As a result energy flows in ecosystems.
This flow of energy can be represented with
food chains and food webs.
For most ecosystems the ultimate energy source
is the sun
As you move from one organism to another you
move up trophic levels.
For example moving from the mollusk to the
white perch would be a trophic level
Producers which use photosynthesis to create
their energy are a large source of energy
in an ecosystem.
Plants and algae are examples of producers.
As consumers eat these producers, carbon bonds
are broken and energy is released and this
energy is transferred from one level to another.
As you move from one trophic level to another
you lose 90 percent of the energy.
This is known as the 10 percent rule.
For example if you start with 1000 Joule and
a grasshopper eats the plants only 10 Joule
will be transferred, and a bird eats the insect
on 1 Joule will be transferred
Where does this energy go?
Most of the energy is lost as heat
The energy flow in an ecosystem follows the
laws of thermodynamic
The first law states that states that energy
cannot be created or destroyed in an isolated
system however it can be converted from one
form to another
The second law states that this energy conversion
is never completely efficient.
As a result, most energy is lost as heat.
So there you go.
The energy flow in an ecosystem
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