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  • Oh, hello friends!

  • Are you wondering what this is?

  • Well, it's the molten lava that comes out from a volcano

  • Come, let me tell you what a volcano is.

  • Zoooom in!

  • I am sure you've seen mountains that open up

  • and blurt out thick molten semi-solid like substance?

  • Well, that's called a volcano!

  • Let’s learn more about it.

  • A volcano is a vent or 'chimney'

  • that connects Magma from within the Earth’s crust

  • to the Earth's surface.

  • The liquid rock is called Magma

  • when it is under the earth's surface

  • and Lava after it comes out.

  • So how does a volcano erupt?

  • The molten rock stored in the magma chamber

  • rises through the crater pipe pockets.

  • As it travels up the main vent,

  • gases expand and water becomes steam, creating pressure.

  • When the pressure can no longer be contained

  • the volcano erupts through the crater

  • and secondary side vents.

  • Common volcanic gases include

  • water vapour, carbon dioxide, sulfur dioxide,

  • hydrogen chloride, hydrogen fluoride

  • and hydrogen sulfide.

  • Popular belief is that

  • Volcanoes are large cone-shaped mountains but that's not true.

  • There are many more types of volcanoes, such as -

  • wide plateaus,

  • fissure vents

  • and bulging dome shapes.

  • There are also volcanoes found on the ocean floor

  • and even under icecaps

  • such as those found in Iceland.

  • The word volcano

  • originally comes from the name of the Roman god of fire

  • Vulcan

  • The tallest volcano in the Solar System isn’t on Earth at all

  • but on Mars.

  • So tune in next time

  • for some more fun filled facts.

  • This is me Zooominout

Oh, hello friends!

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B2 中高級 美國腔

火山|雙筒望遠鏡博士秀|兒童學習視頻教程----------。 (Volcano | The Dr. Binocs Show | Learn Videos For Kids)

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    Amy.Lin 發佈於 2021 年 01 月 14 日
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