1. What made a volcano different from a mountain?

A volcano is a type of mountain but it has magma, crater and lava. Mountains contain water. A mountain will have an elevation higher than its surroundings but not all volcanoes rise higher than their surroundings. Volcanoes can be a part of mountain ranges.

2. How are volcanoes formed?

A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth's surface. The molten rock and ash solidify as they cool, forming the distinctive volcano shape shown here. As a volcano erupts, it spills lava that flows downslope. Hot ash and gases are thrown into the air.

3. When it can be said that a geologic feature is a volcano?

The geological processes, such as volcanic eruptions, earthquakes, erosion, and deposition are what create or change geological features. Volcanoes are created by internal forces within the Earth that cause heated, melted rock (magma) to rise to the surface.

4. What do you think are the reasons why volcano erupts?

Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts. If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises. When the pressure is too much an explosive eruption can happen, which can be dangerous and destructive.

—Hope it helps :-)

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