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.Volcanoes are formed from hot molten rock coming up into the surface of earth.volcanic pressure builds up and then BOOM!!!.changes landscapes and can benefit soil. Different types some ooze some just Explode. Volcanoes usually occur when

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1. Volcanoes are formed hot molten rocks deep inside the earth finds its way to the surface.

2. Volcanoes don't always explode when they erupt.

3. Magma form because there are gases and magma trapped deep inside earth, when they get hot enough they explode and expand.

4. When magma are cool down they form into hard rock or lava dome.

5. New land are made by lava flowing into sea.

6. Water builds up pressure and explode.

7. Lava is over 1000 degrees Celsius.

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98% of what comes out of Taupo is Pumice and Tephra. In a way, Taupo is a stratovolcano, because tephra erupts and settles, forming more and more layers.

Mt Ruapehu usually erupts andesitic material (fine-grained brown to grey, silt-like volcanic rock). Mt Ruapehu erupts ash, which travels further than any other volcanic material. Once, ash from an eruption slightly melted cars and metal strucutures.The crater lake is filled with 8-10 cubic metres of acidic water.

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Volcano's are formed by molten rock forcing its way to the surface.

Plates moved because of lava plumes and created hawaiian island.

Volcano benefit us because they form new land and transform landscaepes.

Auckland and hawaii are similar because they are both in places where the crust is thin and they are both hotspots.

Mt St Helens created a alternate vent when the actual vent was blocked.

Volcano's usually occur when techtonic plates run into each other.

The magma in the volcano's doesn't flow continuously, instead it splutters away like smoke in a chimney

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Rhyolite is a stone when it cools down.

In liquid state, Rhyolite lava is viscous due

to high silica content.

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Volcanoes releases sulphur oxide and other

poisonous gases that cause our lungs to stop working!

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Auckland is a monogenetic volcanic field,

A monogenetic field is a bunch of volcanos

that won't erupt again, poly genetic means

volcanos are still active

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Volcanic gases provide atmosphere, and is held

Down by gravity, this is applied to to all planets in the

Solar system. Neat fact.

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A volcano's magma can reach up to 1000 degree celsius.

When a volcano erupts, tephra, lava, pyroclastic flows, ash, gases, water and other rocks and solids comes out

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Taupo's Oruanui eruption put out 1170 cubic kilometres of material, mainly composed of pyroclastic fall.

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Thick ash from the eruption can be seen in road cuttings around the central North Island. The rocks that comes out of the Taupo eruptions are Tephra is volcanic ash and debris that has fallen from the air and formed layers. Lgnimbrite is formed from a hot ash flow that has harden into rock. Obsidian a natural volcanic glass found in the Taupo volcanic zone. When its chipped it has an harder edge that steel. Pumice is a kind of magma with lots of tiny bubbles of gas trapped in it.

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Mt Ruapehu had 8-10 million cubic metres of acidic water in its crater lake, so if it were to erupt It would rain acid!

Lake Taupo erupted 60 million cubic kilometres of earth rock and mud!!!!!

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MT Ruapehu erupts andestic material it is like fine grained rice usually brown or greyish!

(In 1996 produced 7 million tonnes of ash that fell onto taupo Lake and caldera volcano )

Taupo

Rhyolite is the main material that is erupted from lake Taupo.(98%) and 2% of other materials such as rocks ash and chemical gases and acids.Rhyolite has a glassy texture like quartz. Rhyolite consists of sandine and plagcocise which can kill if you inhale to much of it.

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View the Youtube clip

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I DO NOT OWN ANY OF THE VIDEO'S CONTENTS COPYRIGHTED. THE FOLLOWING VIDEOS ARE FOR ENTERTAINMENT PURPOSES. ********************************************************************* A fun way to learn Science with hilarious scientist Bill Nye. Enjoy!