Physical geography: Water and carbon cycles: Systems concept.

1. Define positive feedback.

  • The effect of a change does not influence the processes in the system.
  • The inputs and outputs of a systems are made level.
  • Enhances and effect, which has an impact on the process- leading to a "SNOWBALL EFFECT."
  • The inputs and outputs of the system are reduced by one change, which further reduces the inputs into the system.
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Other questions in this quiz

2. What is a open system ?

  • A system that does not transfer any material.
  • Systems that have external inputs and & outputs of energy & matter.
  • A system that transfers only matter.
  • A system that transfers only energy.

3. Define dynamic equillibrium

  • The inputs are not level to the outputs in the system.
  • The state of balance in a system, where both the level of inputs and outputs are equal.
  • The level of inputs and outputs are not equal.
  • When the system is not in a state of balance.

4. What is a closed system?

  • A system that has interactions only outside of the system boundary.
  • A system that transfers both energy and matter into and beyond the system boundary.
  • A system that transfers energy into and outside of the system boundary, does NOT transfer matter.
  • A system that transfers only matter into and beyond the system boundary.

5. Idenitfy one factor that can cause disbalance in the system.

  • Large storm events- storm surges.
  • The day of the week.
  • How old the system is.
  • The time that it takes the inputs to enter the system.

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