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<p class="has-text-align-center has-large-font-size">Cảnh thiên nhiên núi non</p>
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<p>A <strong>mountain</strong> is an elevated portion of the <a href="https://en.wikipedia.org/wiki/Earth%27s_crust">Earth's crust</a>, generally with steep sides that show significant exposed <a href="https://en.wikipedia.org/wiki/Bedrock">bedrock</a>. A mountain differs from a <a href="https://en.wikipedia.org/wiki/Plateau">plateau</a> in having a limited summit area, and is larger than a <a href="https://en.wikipedia.org/wiki/Hill">hill</a>, typically rising at least 300 metres (1000 feet) above the surrounding land. A few mountains are isolated <a href="https://en.wikipedia.org/wiki/Summit_(topography)">summits</a>, but most occur in <a href="https://en.wikipedia.org/wiki/Mountain_range">mountain ranges</a>.</p>
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<p><a href="https://en.wikipedia.org/wiki/Mountain_formation">Mountains are formed</a> through <a href="https://en.wikipedia.org/wiki/Tectonic_plate">tectonic forces</a>, <a href="https://en.wikipedia.org/wiki/Erosion">erosion</a>, or <a href="https://en.wikipedia.org/wiki/Volcanism">volcanism</a>, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of <a href="https://en.wikipedia.org/wiki/Weathering">weathering</a>, through <a href="https://en.wikipedia.org/wiki/Slump_(geology)">slumping</a> and other forms of <a href="https://en.wikipedia.org/wiki/Mass_wasting">mass wasting</a>, as well as through <a href="https://en.wikipedia.org/wiki/Erosion">erosion</a> by <a href="https://en.wikipedia.org/wiki/River">rivers</a> and <a href="https://en.wikipedia.org/wiki/Glacier">glaciers</a>.</p>
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