Mountains are classified as Second-order landforms. In geomorphology, First-order landforms are the continents and ocean basins. Second-order landforms are the major features built upon them by internal tectonic forces, such as mountains, plateaus and plains. Third-order landforms are smaller features like valleys and dunes, shaped by external erosional forces like water and wind. ANSWER: (B) Second order
In which category of landforms are mountains classified? (A) First order (B) Second order (C) Third order (D) None of these
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In the classification of relief features, mountains are categorized as Second-order landforms. This hierarchy is based on the scale and origin of the feature. First-order relief includes the massive structural units of the Earth: the continents and the ocean basins. Second-order landforms, like mountains and plateaus, are created by endogenic (internal) forces such as folding, faulting and volcanic activity occurring on the crust. These are the large-scale “constructional” features of our planet. Finally, Third-order landforms are smaller, “destructional” features like valleys, canyons and cirques, which are carved into the second-order forms by exogenic (external) erosional processes.