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Question
The Rocky Mountains began forming in the western United States about 60 million years ago. The Appalachian Mountains and the Rocky Mountains were similar in height when they first formed. Which statements about the Rocky Mountains are true? Select the two correct answers.(1 point)
Responses
They are older than the Appalachian Mountains.
They are older than the Appalachian Mountains.
They are younger than the Appalachian Mountains.
They are younger than the Appalachian Mountains.
They are taller than the Appalachian Mountains.
They are taller than the Appalachian Mountains.
They are shorter than the Appalachian Mountains.
1 answer
The two correct answers about the Rocky Mountains are:
The Rocky Mountains began forming around 60 million years ago, while the Appalachian Mountains are much older, having formed around 480 million years ago. Initially, the heights of the two ranges were similar, but over time, the Rockies have been shaped and uplifted to be taller than the Appalachians.
