Explanation of Natural Disaster.
What is A Volcano?A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur. Gases and rock shoot up through the opening and spill over or fill the air with lava fragments. Eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides, avalanches, falling ash and floods. Volcano eruptions have been known to knock down entire forests. An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows and rockfalls.
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How are Volcanoes formed?Volcanoes are formed when magma from the mantle melts, moves to the surface through the crust, and releases pent-up gases, volcanoes erupt. When a large body of magma has formed, it rises through the denser rock layers toward Earth's surface. Magma that has reached the surface is called lava. Over time as the volcano continues to erupt, it will get larger.
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How do Volcanoes occur?Because the Earth it is so hot some rocks slowly melt and become a thick flowing substance called magma. Due to the fact, it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually some of the magma pushes through vents and fissures in the Earth's surface.
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Interesting Facts!
no.1: There are four types of volcanoes cinder, composite, shield and ash flow caldera.
no.2: Volcanoes erupt because of magma escaping from beneath the Earth’s crust. no.3: Volcanoes can be active, dormant or extinct. no.4: Volcanoes can grow quickly. no.5: The tallest volcano in the Solar System isn’t on Earth. |
no.6: The tallest and biggest volcanoes on Earth are side by side.
no.7: The most distant point from the center of the Earth is a volcano. no.8: The biggest volcanic eruption ever recorded by humans was the explosion of Mount Tambora on Sumbawa Island, Indonesia, in 1815. no.9: Hawaii's Kilauea volcano, one of the most active on Earth, has been erupting continuously for more than 29 years, beginning Jan. 3, 1983. no.10: More than 90 percent of Kilauea's surface is covered by lava less than 1,100 years old. |