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Climate Feedback Mechanisms (Grade 10)

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Climate Feedback Mechanisms

1. 
In Earth Science, feedback mechanisms involve
  1. the biosphere.
  2. the lithosphere.
  3. the hydrosphere.
  4. the atmosphere.
  5. all of the above.
2. 
Feedback loops are                 mechanisms that involve                 variables.
  1. simple; a few
  2. simple; many
  3. complex; a few
  4. complex; many
3. 
A negative feedback loop                          change and a positive feedback loop                          change.
  1. decelerates; accelerates
  2. accelerates; decelerates
4. 
Which is an example of a negative feedback loop?
  1. global warming
  2. biological homeostasis
  3. exponential population growth
5. 
Negative feedback loops tend to                       the environment and positive feedback loops tend to                       environmental problems.
  1. stabilize; decrease
  2. stabilize; increase
  3. destabilize; decrease
  4. destabilize; increase
6. 
Is the scenario described below an example or a positive or negative feedback loop?

melting polar ice decreases solar energy reflection resulting in warming temperatures and more ice melt
  1. positive
  2. negative
7. 
Is the scenario described below an example or a positive or negative feedback loop?

increased growth in vegetation also increases evaporation and decreases water runoff and infiltration resulting in more precipitation and plant growth
  1. positive
  2. negative
8. 
Is the scenario described below an example or a positive or negative feedback loop?

increase in evaporation creates more clouds that reflect more light away from Earth resulting in a decrease in temperatures and evaporation
  1. positive
  2. negative
9. 
Is the scenario described below an example or a positive or negative feedback loop?

melting permafrost releases methane into the atmosphere resulting in increasing global temperatures
  1. positive
  2. negative
10. 
The diagram represents the carbon cycle. Describe how Earth naturally balances carbon and carbon dioxide levels. Next, describe the role of human fossil fuel consumption and how this impacts the carbon cycle.
Carbon Cycle With Text Labels






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