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3 Earth’s Environmental Systems CHAPTER. Lesson 3.2 Systems in Environmental Science Positive feedback loops can help erosion turn a fertile field to.

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Presentation on theme: "3 Earth’s Environmental Systems CHAPTER. Lesson 3.2 Systems in Environmental Science Positive feedback loops can help erosion turn a fertile field to."— Presentation transcript:

1 3 Earth’s Environmental Systems CHAPTER

2 Lesson 3.2 Systems in Environmental Science Positive feedback loops can help erosion turn a fertile field to desert in just a few years. Dust storm, Stratford Texas, 1930s

3 Interacting Systems Lesson 3.2 Systems in Environmental Science Inputs into Earth’s interconnected systems include energy, information, and matter. Feedback loops regulate systems. Negative feedback loops: Result in stabilization of a system Positive feedback loops: Result in a system moving to an extreme Did You Know? Predator-prey cycles are negative feedback loops. If prey populations rise, predator populations can rise in response, causing prey populations to fall. Then predator populations may decline, allowing prey populations to rise again, and so on. Negative feedback loop

4 Did You Know? Predator-prey cycles are negative feedback loops. If prey populations rise, predator populations can rise in response, causing prey populations to fall. Then predator populations may decline, allowing prey populations to rise again, and so on.

5 Spheres of Function Earth can be divided into spheres that are defined according to their location and function. Lesson 3.2 Systems in Environmental Science

6 Geosphere, Lithosphere Geosphere-made of rock and anything BELOW Earth’s surface. Lithosphere-the hard rock on or below Earth’s surface Biosphere-Consists of all living or once living things thrived Geosphere-made of rock and anything BELOW Earth’s surface. Lithosphere-the hard rock on or below Earth’s surface Biosphere-Consists of all living or once living things thrived

7 Atmosphere & Hydrosphere Atmosphere-all layers of gas that surrounds out planet Hydrosphere-encompasses all water Ex. Great lakes are part of the Hydrosphere Atmosphere-all layers of gas that surrounds out planet Hydrosphere-encompasses all water Ex. Great lakes are part of the Hydrosphere

8 Crust, Mantle, & Core


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