energy transfer in the ecosystem. engage pre-assessment:
TRANSCRIPT
ExploreStudents are broken up into 3 trophic levels: 20 Primary Consumers, 7 Secondary Consumers, and 3 Tertiary Consumers to explore how energy is transferred and lost in the ecosystem.
Poker Chips = Energy from the producers
20 students
200/2000
7 students
20/200
3 students
2/20
Name Amount of Energy Started with
Amount of Energy Gained (%)
Amount of Energy Lost (%)
Primary Consumer
Secondary Consumer
Tertiary Consumer
Explain Ten Percent Rule: during the transfer of energy from organic food from one trophic level to the next, only about ten percent of the energy from organic matter is stored as flesh. The remaining is lost during transfer, broken down in respiration, or lost to incomplete digestion by higher trophic levels
ElaborateMath Extension: • What percentage of energy will
remain if we add a fourth and fifth level?
Science Extension: • Where does the lost energy go?• How does the Rule of 10 affect
population numbers of each trophic level?