Q:

How do volcanoes change the Earth's surface?

A:

Quick Answer

Volcanic eruptions involve the incursion of liquid magma into a physical environment, and the effects include major transformations, ranging from the formation of new land to the destruction of the viability of an existing environment. Just one example of the creation of new land comes from the Hawaiian Islands, which appeared as magma cooled into land after eruptions.

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How do volcanoes change the Earth's surface?
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Full Answer

As lava flows across the ground in the wake of a volcanic eruption, any existing plant life is at risk of immediate destruction. When lava mixes in with melting snow or rain water, the flow speeds up, and the environmental effects accelerate as well, because the destructive effects of the lava largely remain, but the spread is generally wider and takes place more quickly.

An example of this took place in Montserrat when Chances Peak entered a phase of eruption between 1995 and 2000. In 1995, the mountain began giving off signs of coming activity through eruptions of ash and dust. The most intense eruptions took place in 1997, and 11,000 people were evacuated to the northern end of the island as well as to other islands.

The result of the eruptions involved the covering of the capital in mud and ash, and the destruction of more than a dozen settlements which have been rendered uninhabitable.

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    Why do volcanoes occur?

    A:

    Volcanoes occur when magma from the earth's mantle reaches the surface. This can happen at the place where two tectonic plates diverge or converge. It can also occur in a place called a hotspot, in which magma from the mantle reaches the surface in the middle of a tectonic plate.

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    How do volcanoes work?

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    Volcanoes are vents in the Earth's crust that allow liquid lava from inside the planet to travel to the surface. According to Reference.com, the word "volcano" applies to both the vent and the cylindrical cone the lava forms.

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    Where do volcanoes form?

    A:

    Volcanoes can form anywhere the Earth's crust allows magma to reach the surface. Typically, this occurs around plate boundaries, either where plates are pulling apart or where one is forcing its way under another. Weak spots can also develop away from plate edges, creating magma vents called hot spots.

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    When do volcanoes occur?

    A:

    Volcanoes occur when magma is able to reach the surface of the Earth through a gap in the crust. This typically occurs at plate boundaries, where two tectonic plates pull away or move against each other. Volcanoes can also form at weak points in plates, called hot spots.

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