Volcano Quiz

What are some of the differences between a shield volcano and a stratovolcano?

Shape, Size, Lava

What are the three main factors that determine a volcanoes VEI rating?

The amount of tephra, the height of eruption cloud, and the destination of the eruption

How can you tell if a volcano is active, dormant, extinct?

Active Volcano- currently erupting or has been observed erupting. Dormant Volcano- inactive but uneroded Extinct Volcano- inactive and heavily eroded

What is the order (smallest to largest) of the four types of solid emissions that can come from volcanoes?

Ash, Cinder, Block, Bomb

What are the three main ways to predict a volcano eruption?

Earthquakes, Heat temps rising, Swelling of the volcano and volcanic ash clouds

What is a pyroclastic flow?

Hot ash, lava, and solid gas emissions

Generally, the earth's crust gets hotter the lower you go towards the Earth's core. There are two exceptions where this is not true, what are they?

Igneous intrusions such as geysers and hot spots; and Tectonic plates when they rub together.

What is a geyser?

It is a hot spring that ejects water at regular intervals due to pressure.

What is a volcano terrace and how is it created?

It is created near geysers and hot springs when minerals dissolve into the water.

The Circum-Pacific Volcanic belt has the most volcanoes in the world, what is the nickname for this location?

The Ring of Fire

How does a volcano hot spot work?

The hot spot pushes up magma through making it solidify into volcanos and then when the tectonic plates move, it takes the volcanoes with them, but the hot spot stays in place creating more volcanoes.

What is unique about the volcano eruption at Mt. Vesuvius that happened in 79 AD?

The pyroclastic flow encased the bodies and they still remain today.

The people of Goma believed in a spirit called the Mazuku. How can this "spirit" be explained with science?

The spirit was CO2 which is more dense so it goes lower killing children when they play in it.

How did Mt. Tambora's eruption affect other people around the world that year?

There was an extreme amount of ash and that blocked out the sun's heat. Making that year called the "Year without Summer"

What are volcanic fissures?

They are the cracks in the line of lava which helps it travel along land.

What does VEI stand for when rating volcanoes?

Volcanic Explosivity Index

How would you explain lake overturn in your own words?

When things die off due to too much carbon dioxide being breathed in.

What are the two main gases emitted from a volcano?

SO2 and CO2

What compound is included in all types of lava and determines the thickness and name of the lava?

Scilica

Where does the name volcano come from?

Named after Volcan the god of fire from Vulcano Island