D4.3 Feedback cycles - written task 1
This structured extension question is in the style of the IB exam questions.
It has a particular focus on the concept of feedback in the context of global warming.
The question begins with a little bit of information.
This provides some clues to help answer the questions, but it doesn't give the answers.
The focus of the questions is the impact of climate change on polar ecosystems.
This question is in the style of the IB exam structured questions and begins with a little bit of information.
The focus of the questions is the impact of climate change on polar ecosystems.
Some parts of the question contain information, this provides some clues to help answer the questions, but it does not give the answers.
Feedback cycles have an effect on global warming
The diagram shows a feedback effect caused by increased melting of ice sheets
1. Deduce whether the melting of ice sheets has a positive or a negative feedback effect on global warming.
Justify your answer with a reason.
(2 marks)
2. List two negative effects on Arctic animal populations due to polar ice sheet loss
(2 marks)
Teachers note.
Examples should be more detailed than just general animal types, e.g. Fish or bears
Polar bears, brown bears or grizzly bears are acceptable, binomial species names are not required.
3. A further effect of increasing melting of permafrost is the release of carbon dioxide from the earth's surface into the atmosphere.
Explain why a loss of permafrost causes release of carbon dioxide from the earth's surface.
(4 marks)
Teacher only box- This could be a classroom task, a revision moment or a homework activity.
- There is a hidden model answer which appears when the answer is submitted.
- This page can be set as a "written task' assignment using the student access section.