To understand the significant climate differences between the inner canyon and the north rim of the Grand Canyon, let's delve into the data provided and interpret it along with geographical principles:
1. Elevation Impact:
The elevation of the inner canyon is 2,100 feet, whereas the north rim is at a much higher elevation of 8,000 feet. This difference in elevation greatly influences the temperature. Generally, higher elevations tend to have cooler temperatures. This is due to the fact that as altitude increases, the air becomes thinner and less capable of holding heat.
2. Temperature Variations:
- In July, the average temperature in the inner canyon is 107°F, while the average temperature on the north rim is cooler, at 77°F.
- In January, the inner canyon averages 56°F, contrasting with the colder 37°F on the north rim.
Given these observations, we can deduce the reason behind the climate difference:
- Option A: The north rim being in the rain shadow area does not correlate directly with the given temperature differentials and is not supported by the data provided.
- Option B: The inner canyon being close to a freshwater lake is not mentioned in the context, and thus it is not a factor we have information on or that aligns with the observed data.
- Option C: The north rim being higher than the inner canyon is a clear and significant factor. Higher elevations are associated with lower temperatures, which is evident in the data provided.
- Option D: The inner canyon being close to the ocean is not relevant to the data given and does not align with the geographical location of the Grand Canyon itself.
Based on the information provided in the table and a logical understanding of how elevation affects temperature, the correct answer is:
C. The north rim is higher than the inner canyon.
