A volcano is an opening on the surface of a planet or moon that allows material warmer than its surroundings to escape from its interior. When this material escapes, it causes an eruption. Lava
Lava
Lava is the molten rock expelled by a volcano during an eruption. The resulting rock after solidification and cooling is also called lava. The molten rock is formed in the interior of some planets, including Earth, and some of their satellites. The source of the heat that melts the r…
Can you give a description of a volcano?
A volcano is an opening on the surface of a planet or moon that allows material warmer than its surroundings to escape from its interior. When this material escapes, it causes an eruption. Lava fountain at Kīlauea Volcano, Hawai`i. Credit: J.D Griggs, USGS
What is an example of a volcano?
Mount St. Helens in Washington State, US, is an example of a volcano.In 1883 and 1815, the Krakatau and Mount Tambora volcano eruptions that had the biggest explosive and destructive effects in modern times, were some of the largest eruptions of volcanoes. What Is An Example Of A Volcano? What Are Volcanoes 3 Examples?
How do you measure a volcano?
Tools to Monitor Volcanoes
- Assessing Seismicity. The simplest and cheapest way to monitor a volcano is with seismometers. ...
- Detecting Gases. Water vapor quickly turns into clouds of liquid water droplets and is relatively easy to detect just by looking, but CO 2 and SO 2 are not as ...
- Measuring Deformation. A GPS unit installed at Hualalai volcano, Hawaii. ...
How do we describe and differentiate volcanoes?
- Fissure Volcanoes , basically erupts from the ground.
- Shield Volcanoes , low ridged type
- Compostive Volcanoes , very high cone
- Caldera Volcanoes , high ridge type with collapsed
What words can you use to describe a volcano?
Volcanos - thesaurusactive. adjective. an active volcano is likely to erupt (=explode and pour out fire) at any time. ... crater. noun. the round hole at the top of a volcano.dormant. adjective. ... erupt. verb. ... extinct. adjective. ... inactive. adjective. ... lava. noun. ... lava. noun.More items...
How will you describe an erupting volcano?
A volcanic eruption is when lava and gas are released from a volcano—sometimes explosively. The most dangerous type of eruption is called a 'glowing avalanche' which is when freshly erupted magma flows down the sides of a volcano. They can travel quickly and reach temperatures of up to 1,200 degrees Fahrenheit.
How do you describe an active volcano?
A volcano is currently active if it is erupting lava, releasing gas or generating seismic activity. An active volcano is labelled dormant if it has not erupted for a long time but could erupt again in the future. When a volcano has been dormant for more than 10 000 years, it is considered extinct.
How do you describe lava in a volcano?
A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water.
How do you explain a volcano to a child?
A volcano is a mountain or hill with an opening. When a volcano erupts, magma is pushed up through the opening with great force. When magma reaches the Earth's surface, it is called lava. Lava can be as hot as 2,200°F (1,204°C).
What happens after a volcano erupts?
Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires.
What are the five characteristic of volcano?
The five characteristics of a composite volcano involve their lava type, shape, composition, eruption type, and duration between eruptions. The lava of a composite volcano is viscous and sticky, preventing it from flowing far from the opening where it emerges. The shape of the volcano is a steep cone.
What is active volcano essay?
A volcano is active if it's currently erupting or showing signs of unrest. The Smithsonian Global Volcanism Program defines an active volcano as having erupted within the last 10,000 years. A volcano finally goes extinct when there's no lava supply in the magma chamber beneath the volcano.
How does a volcano look like?
1:374:58Volcanoes 101 | National Geographic - YouTubeYouTubeStart of suggested clipEnd of suggested clipIn addition to Lava volcanoes May erupt with searing Hot Gas formed in the mantle. In a phenomenonMoreIn addition to Lava volcanoes May erupt with searing Hot Gas formed in the mantle. In a phenomenon called pyroclastic flow this gas combined with hot ash can race down the sides of a volcano.
What does lava smell like?
Burned Material. Occasionally, lava will take on the scent of whatever it is burning as it flows. For instance, if it is flowing through a forest or over grass, it may smell like a campfire as it incinerates the organic material beneath it, as we experienced on Kilauea.
What does lava taste like?
Mostly once cooled all volcanic rocks have a non taste. Freshly cooled lava can have smell and taste from roasted trees and other organics that it burned up. Consider that Hawaiian lava cooled in the ocean might taste salty unless the salt was washed away with rain water.
Why are so many volcanoes erupting?
Volcanoes erupt when molten rock, which is known as magma, rises to the Earth's surface and this is caused by the movement of tectonic plates.
What causes some volcanoes to have very explosive eruptions?
A volcano's explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.