Page 59 - Science Course 3 (Book 1)
P. 59

Mo2-L2b: How Does Matter Move in an Ecosystem?




                                                                  Cycling Materials
                  Mo2-L2b        How Does Matter Move in an       The law of conservation of matter states that matter
                                        Ecosystem?
                                                                  cannot be created or destroyed, but it can change
                KEY CONCEPTS:                                     form.
                1. How does matter move through an ecosystem?
                                                                  Matter is recycled through ecosystems, changing
                                                                  form along the way.
                            Vocabulary A-Z

                            Let us learn some vocabulary
                                                                                         Consumer
                Energy Pyramid
                a model that shows the amount of energy available          Producer                 Decomposer
                in each link of a food chain.

                                                                   Matter
                                                                                         Non-living
                                                                   Energy Transfer        Matter
                                                                   Energy loss (heat)

                                                                             Three of the most important pathways of
                                                                            matter moving through an ecosystem are
                                                                            described by the nitrogen cycle, the water
                                                                           cycle, and the oxygen-carbon dioxide cycle.







                                                                                              Cycle











                                                                                               Flow
               Let’s Begin



               The Flow of Energy                                             Ecological Cycles

               An energy pyramid is a model that shows the
               amount of energy available in each link of a
               food chain.
                                                                                  Biosphere
               The loss of energy at each level of an energy
               pyramid helps explain why there are always                   Phosp-
               more producers than carnivores in a                  Carbon   horus  Nitrogen  Water   Oxygen
               community.                                           Cycle             Cycle   Cycle    Cycle
                                                                             Cycle
                                                                               Heat in the Environment




                                                                                                                  51
   54   55   56   57   58   59   60   61   62   63   64