Q. Which of the following statements regarding the physical features of North America are correct?
1.Denali, located in the Alaska Range, is the highest mountain peak in both the United States and the continent of North America.
2.The Canadian Shield consists of ancient Precambrian bedrock whose topography has been significantly reduced by prolonged erosion and weathering.
3.Mount Mitchell forms the highest elevation point within the Western Cordilleras system.
4.The Great Plains represent tropical savanna ecosystems extending along the Atlantic coast.
Select the answer using the code given below:
Answer: A
Notes:
Explanation:
- Statement 1 is correct: Denali (formerly Mt. McKinley), rising to 6,190 meters in the Alaska Range, is the highest peak in North America.
- Statement 2 is correct: The Canadian Shield is a vast area of exposed Precambrian crystalline rock (remnants of ancient continental crust) that has been eroded and scoured by successive glaciations.
- Statement 3 is incorrect: Mount Mitchell (2,037 m) is the highest peak of the Appalachian Mountains in eastern North America.
- Statement 4 is incorrect: The Great Plains consist of temperate grasslands (known locally as Prairies).
