* Young mountains are typically sharp and jagged, with steep slopes and prominent peaks. They haven't had much time to be worn down by weathering and erosion.
* Old mountains are rounder and smoother, with gentler slopes and less prominent peaks. They have been exposed to the elements for a much longer time, causing them to erode and become more rounded.
Think of it like this:
* Young mountains are like a freshly carved statue, sharp and detailed.
* Old mountains are like a statue that's been exposed to the weather for centuries, worn down and smoothed by time.
However, it's important to note that this is just one indicator. There are other factors that can influence a mountain's appearance, like the type of rock it's made of and the climate it's in.
