MOUNTAINS are formed when the plates of Earth's crust crash into each other, and the land pushed upwards .Mountains are also formed when volcanoes erupt and molten rocks build up into steep mounds. There are several mountains on the Earth.The tallest and youngest mountain are the Himalayas.They are formed over last 140 million years. The structure of a mountain should be steep and must have an obvious summit. A Mountain can be divided into zones according to altitude , the difference of temperature, availability of air etc.Temperature drops by about 1 degree C for every 200m(650ft)The different altitudes are- MID Altitude - The foothills are covered by forests, but trees end at a ' tree line beyond which trees are not found due to cold and dry climate. High Altitude - This is above the treeline where only few shrubs can grow which a