Context: The Appalachian Mountains (i/ˌæpəˈleɪʃᵻn/ or /ˌæpəˈlætʃᵻn/,[note 1] French: les Appalaches), often called the Appalachians, are a system of mountains in eastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period and once reached elevations similar to those of the Alps and the Rocky Mountains before they were eroded. The Appalachian chain is a barrier to east-west travel as it forms a series of alternating ridgelines and valleys oriented in opposition to any road running east-west.

Question: What are the Appalachian mountains called in French?
Answer: les Appalaches

Question: What are the Appalachian mountains?
Answer: a system of mountains in eastern North America

Question: When did the Appalachian mountains form?
Answer: roughly 480 million years ago

Question: In what era did the mountains form?
Answer: Ordovician Period

Question: What are often called les Appalaches?
Answer: Unanswerable

Question: When were the Rocky Mountains formed?
Answer: Unanswerable

Question: What language does the name of the Alps come from?
Answer: Unanswerable

Question: What do the Alps form a barrier between?
Answer: Unanswerable

Question: During what period were the Appalachians named?
Answer: Unanswerable