ITEM BANK: Move to Bottom closed
input
open
shoreline
An ecosystem consists of the biological community that occurs in some locale, and the physical and chemical factors that make up its non-living or
abiotic environment. There are many examples of ecosystems -- a pond, a forest, an estuary, a grassland. Sometimes the boundaries are not obvious
but in a pond the drag and drop answer here becomes the boundary. One drag and drop answer here into the pond system is energy in the form of
sunlight. Energy moves through the trophic levels of the pond system. It is not recycled so this is an drag and drop answer here subsystem within the
pond. Nutrients, carbon, nitrogen, phosphorus, are recycled when an organism dies and decomposes. The pond is a drag and drop answer here
subsystem with respect to these nutrients,
Submit Answers
Cycling of Energy and Matter