It depends, but probably many many thousands of years.
Nowhere is safe from tornadoes. Tornadoes can climb mountains. There was a tornado on 12,000 foot mountain once. here's a good site to look at: http://www.nssl.noaa.gov/edu/safety/tornadoguide.html
The material on the mountains was not always up there. Mountains are generally created by what is called uplift. And places that were under water and then had remains laid down and fossilized can be uplifted through long periods of time to create mountains. The fossils are then found up there in the mountains. The geologic process is fairly well understood and modeled by geologists.
how long idoes it take the weather to change
No, the average weather of an area over long periods of time is climate. Weather happens from day to day and from year to year. Climate change takes longer than that. So the fact that 2010 was warmer than 2011 means only that weather changes from year to year. There are spikes, both up and down, in measurements and we have to look at longer term averages to see trends.
long term variations of weather is climate
What is formed in the shape of a long, low land area between hills or mountains
What is formed in the shape of a long, low land area between hills or mountains
What is formed in the shape of a long, low land area between hills or mountains
What is formed in the shape of a long, low land area between hills or mountains
valley =)
In most circumstances the lowlands between mountains or hills is refered to as a valley. These areas are generally more fertile than the surrounding mountainsides to to erosion, and mineral deposits from weather.
Valley?
Valley
Valley A+ your welcome pgtv
plateaus
A long, narrow , deep inlet of the sea between hills or mountains
Louis L'Amour's Down the Long Hills - 1986 TV is rated/received certificates of: Iceland:L