The "big idea" of this scope is that every organism needs energy in order to survive. Organisms use energy to carry out such functions as respiration, metabolism, movement, and temperature maintenance. Within an ecosystem, energy is obtained from external sources and cycled through a food pyramid. Each level in a food pyramid is called a trophic level. Energy moves through an ecosystem from the Sun to producers, consumers, and decomposers in turn, creating a pool of organic resources. Only about ten percent of the energy at each trophic level is available to pass along to the next level of a food pyramid. There is less energy available to support the organisms in each increasing level, so the population sizes decrease as you move up the food pyramid. This is why the energy flow is illustrated in the shape of a pyramid.
5E Lesson Model:
The tentative test date for this scope is Wednesday, 11/14. It will be the CER and 5 multiple choice questions.