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The Energy Connection Notes
What is this?
• A food chain• A diagram that
shows how each living thing gets food, and how nutrients and energy are passed from creature to creature.
What is this called? • A food web
• A diagram that shows the feeding relationships among organisms
Food Chain -vs - Food Web
Let’s Compare!
Food Chain Food WebLinear BranchingShows relationship Shows relationshipbetween 2 organisms among many organisms
Both shows what organisms eat arrows show the direction energy is flowing (energy goes to the animal that is eating)
Primary source of energy =
James Prescott Joule
• Studied the nature of heat which led to the development of…
Laws of Thermodynamics
• The first law of thermodynamics states that energy cannot be created or destroyed; it can only be changed from one form to another.
• The second law of thermodynamics states that whenever energy is transformed, there is a loss of energy through the release of heat.
Energy is measure is units called
Joules
How do we represent the transfer of energy in an
ecosystem?
Food chain
Food Web
Energy Pyramid
What is an energy pyramid?F
low of E
nergy
1st trophic level
3rd trophic level
2nd trophic level
4th trophic level
producers
herbivores
carnivores
100 joules
10 joules
1 joule
.1 joule
Numbers Pyramid
10,000
980
92
8
Biomass Pyramid
200,000g
19200g
2100g
189g
Your Turn!
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