Question

1. apply give three examples of systems in nature that are not discussed in this chapter.
2. explain what can cause a system to become unsustainable?
3. analyze your classroom can be thought of as a system. draw a model of the system. include inputs, throughputs, and outputs.
4. stability and change describe and diagram a positive feedback loop that is not discussed in this chapter

Explanation:

1. Examples of natural systems: The human digestive system breaks down food for energy. The water - cycle system involves evaporation, condensation, and precipitation. The coral - reef ecosystem is a complex system with various organisms interacting.
2. Causes of system unsustainability: Over - exploitation of resources like over - fishing in a marine system can cause it to collapse. Pollution, such as chemical runoff into a river system, can harm organisms and disrupt the system. Introduction of invasive species can out - compete native species and disrupt the balance of an ecosystem.
3. Classroom as a system: Inputs could be students, teachers, books, and technology. Throughputs are the teaching - learning processes, group discussions, and individual study. Outputs are educated students, completed assignments, and improved skills.
4. Positive feedback loop: In a forest fire, the heat from the initial fire dries out nearby vegetation, making it more flammable. This dry vegetation then catches fire more easily, increasing the intensity and spread of the fire. Diagram: Start with "Initial fire", arrow to "Drying of vegetation", arrow to "More intense and spreading fire", arrow back to "Initial fire" to show the loop.

Answer:

1. Human digestive system, water - cycle system, coral - reef ecosystem
2. Over - exploitation of resources, pollution, introduction of invasive species
3. Inputs: students, teachers, books, technology; Throughputs: teaching - learning processes, group discussions, individual study; Outputs: educated students, completed assignments, improved skills
4. In a forest fire, heat dries vegetation which makes the fire spread more, creating a loop. Diagram: Start with "Initial fire", arrow to "Drying of vegetation", arrow to "More intense and spreading fire", arrow back to "Initial fire"