Exercise 3: Sound Pathway Write out the pathway of sound waves entering from the external ear through the ossicles and
as they continue as pressure waves to the organ of Corti in the inner ear. (List all the structures,
layers, cavities, and fluid the light must pass through)

Answerable:

1. What is the overall change in sea ice extent since 1980?

2. In which year was sea ice extent the highest?

3. How has sea ice extent fluctuated every five years since 1980?

Unanswerable:

1. How has the change in the sea ice extent effected precipitation?

2. Which regions have been most affected by reduced sea ice extent?  

3. What is the sea ice extent in 2020?

Explanation:

The graph illustrates the change in sea ice extent in the Arctic region. Thus, it will provide information only for this region and only about the extent of the sea ice. How other factors such as precipitation have been affected cannot be answered with this data only. No information about other regions is present either. As the graph ends in 2015, information about future fluctuations cannot be extracted either.