The correct answer is - They formed long ago, and erosion has beveled them to their present elevation.
The Appalachian Mountain Range is one of the oldest mountain ranges on the planet. They have formed in the Ordovician Period, around 480 million years ago. When they formed and were at their peak, the Appalachians were much larger and higher than what they are in the present. The reason for their decline in size is attributed to the erosion. The erosion is a process that removes the material from its original position. This process has been influencing, at different rates, the Appalachians for almost half a billion years. Even though the erosion is not a process that acts very quickly, when put the time that it influenced these mountains we will see that it managed to lower them significantly. That process continues in the present, and in the manner in which the continents are moving, there shouldn't be any force that will help lift up the Appalachians again, but instead they will continue to shrink until they are flattened in the distant future.
Major volcanic events that have occurred within the Ring of Fire since 1800 included the eruptions of Mount Tambora (1815), Krakatoa (1883), Novarupta (1912), Mount Saint Helens (1980), Mount Ruiz (1985), and Mount Pinatubo (1991).
The correct answer is - false.
Glaciers have sculpted mountains, carved out valleys, made lots of glacial relief structures, and created thousands of glacial lakes over the past, but this process continues nowadays too. Even though in the present we only have glaciers at limited small parts of the planet, they are still active, and are doing their job in the formation of glacial relief forms. Lots of people tend to thing that the glaciers were only doing this in the past, but this is because they are very rare nowadays, and are shadowed by the more dominant factors in an inter-glacial period like we have at the moment.
