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)

Question

Responses

They are older than the Appalachian Mountains.
They are older than the Appalachian Mountains.

They are taller than the Appalachian Mountains.
They are taller than the Appalachian Mountains.

They are younger than the Appalachian Mountains.
They are younger than the Appalachian Mountains.

They are shorter than the Appalachian Mountains.

Answer 1

The two correct statements about the Rocky Mountains are:

1. They are taller than the Appalachian Mountains.
2. They are younger than the Appalachian Mountains.

The Rocky Mountains formed about 60 million years ago, while the Appalachian Mountains are much older, having formed around 480 million years ago.