A science report on volcanoes

US volcano warning: 18 pose ‘very high’ threat level in shock USGS report

Volcano-triggered tsunamis likely triggered another 55, deaths. This is generally when the lava is thin. Indonesia has the most active volcanoes in the world and remains one of the most dangerous areas.

A science report on volcanoes

While we certainly have some big volcanoes here on Earth, the biggest known volcano in our solar system is actually on Mars.

When this happens pressure can build up over a long period of time. Some examples of igneous rocks include basalt and granite. How Volcanoes Affect the World Krakatoa erupted with fury inflinging ash up to 80 kilometers Explain how lava usually moves too slowly to engulf people, but pyroclastic flows can travel down volcano slopes at up to kilometers This creates a new volcano.

He writes articles for various websites, covering cooking and education. How serious are volcanoes to people. Volcanoes can form on land or below the sea. Heavy rains and cool temperatures during the summer of ensured massive crop failures in Russia.

On the positive side, tell your readers how volcanoes can create new islands, produce fertile soil, and produce pumice and other useful products. Geologists call magma "lava" when it leaves a volcano via an eruption or vent.

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Small eruptions pose a threat only to nearby regions. Several large volcanoes rise above the surface of Mars. The main parts of Volcano path. Activity A volcano can be active, dormant, or extinct.

Droughts, flooding and other weather disasters often contribute to widespread crop failures causing famine. Volcanoes can be active regular activitydormant recent historical activity but now quiet or extinct no activity in historical times and unlikely to erupt again.

That mantle is thousands of kilometers miles thick. Volcanoes are usually located where tectonic plates meet. Composed of ash and hot gas, these flows kill anything in their path. Since there should be an opening at the top of the volcano, the gas will come from this point.

Begin your report by explaining how magma -- hot, liquid rock below the earth -- rises because its density is less than the density of the surrounding rocks.

Soils around old lava fields are often fertile and grow good crops. The downward-moving plate carries rock back toward the mantle, where temperatures and pressures are very high. Composite volcanoes - These volcanoes are also shaped like a cone, but are formed from layers of lava over many years.

Finally, a really big eruption can affect global climate. The word volcano originally comes from the name of the Roman god of fire, Vulcan. Learn about hot magma, famous eruptions, volcanoes on other planets, volcanic gases, flowing lava and more. Lava flows are always a concern when volcanoes cause them near populated areas.

Volcanoes are like giant vents for the Earth. Magma and gases build up. Each eruption gets a number based on the amount of ash spewed, the height of the ash plume and the power of the eruption. Watch video · The lava at these volcanoes, formed from molten oceanic crust, is runny and fluid.

It oozes, rather than explodes. As the lava oozes into the ocean, as it.

Explainer: The volcano basics

Volcanoes spew out ash and toxic gases, as well as lava and lava boulders. Pompeii was an ancient city that was completely buried in ash and lava. Mauna Loa in Hawaii (Pacific Ocean) is the world’s largest active shield volcano standing at 4, m high.

Whether your volcano is made out of papier-mâché, clay or cardboard, it could probably use some extra creativity. The erupting volcano has long been a science fair staple, but with a few bells and whistles, you can turn it into an even more impressive project.

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There are known active volcanoes in the United States, and 18 of them pose a "very high threat" of death and destruction to Americans living nearby, according to a new volcanic risk report.

Nov 20,  · Volcanoes. The U.S. Geological Survey defines a volcano as a vent in Earth's surface, either on land or on the seafloor, from which molten rock .

A science report on volcanoes
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USGS: Volcano Hazards Program