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26 Ecological Pyramids

This activity explores energy flow in ecosystems through an ecological pyramid model. It covers energy transfer, trophic levels, photosynthesis, and how only a small percentage of solar energy is captured by producers.

Mason Bennett
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♦Allenergysystemswilldecay IntoEcological Pyramidsfjl(r0lt,opyHow docs energy flow through an ecosystem?entropy withgiven time*Why?Every organism in an ecosystem is cither eating or being eaten. When cows cat grass, they obtain some otthe energy that the grass transferred from the sunlight it absorbed. If cows could carry' out photosynthe-sis, would they have access to more energy' than they get as herbivores? VChich organisms in an ecosystemrequire the most energy to sustain life?Model 1 - Pyramid of Energy24 kcalValues in ihe pyramid arcper square meter per year.T e r t i a r y c o t j s u r t i e i s470 kcalSect i idary coi.auinesPrimary consumers4,000 kcalPrimary producer s25,500 kcal1Sunlight hilling Earths surface1,190,000 kcal1I. A unit used to measure energy is the kcal.fl.What is the source of all energy in the pyramid in Model 1?The source of all the energy of this pyramid is the stirib.How much energy does this source provide to a square meter of the Earth per year? (Be sureyour answer includes units.)3.190,M 0 kcal2. label the pyramid levels in Model I with the following: primary producers, primary' consumers,secondary consumers, and tertiary' consumers.3. The arrows in Model 1 represent the energy' available to the next level of the pyramid.fl.What percentage of the source energy from Question Iais absorbed by the oak leaves inModel I?0.8%b.By what process do the oak leaves harness this energy?They get their energy through photosynthesis process

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Biology

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