Why do some volcanoes erupt explosively whereas others erupt quietly?
The volcanic ash. Mount Vesuvius eruption is that due to the hot ash in the air, casts were formed which preserved the deceased in great detail.
How is it possible that a volcanic island, such as Surtsey, is now home to many different organisms?
How can volcanic activity impact the atmosphere?
There are large explosive eruptions that throw material into the stratosphere but if it only gets into the troposphere it gets flushed out by rain. It depends on the size of the particles (mostly droplets of sulfuric acid). If they are big then they let sunlight in but don’t let heat radiate from the Earth’s surface out, and the result is the Greenhouse effect. If the particles are smaller than about 2 microns then they block some of the incoming energy from the Sun and the Earth cools off a little.
- How can volcanic eruptions impact the surrounding environment including wildlife, human activity and soil?
Volcanic soil is very rich, so once everything cools off, plants can grow back after they are destroyed. Livestock and other mammals have been killed by lava flows, pyroclastic flows, tephra falls, atmospheric effects, gases, and tsunami. Aquatic life can be affected by an increase in acidity, increased turbidity, change in temperature, and/or change in food supply. Eruptions can influence bird migration, roosting, flying ability, and feeding activity.
How do volcanoes form?
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
What are the main parts of a volcano?
The parts of a volcano is an ash cloud, crater,summit,lava,flank,base,sill,conduit,dike,ash,throat,parasitic cone,vent, and magma reservoir.
What causes a volcano to erupt?
Volcanoes erupt because of density and pressure in the Earth's crust.
How does a volcano erupt?
Magma rises through cracks or weaknesses in the Earth's crust. When this pressure is released, eg as a result of plate movement, magma explodes to the surface causing a volcanic eruption.