fbpx
Pin It

A volcano is a rupture on the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because its crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in its mantle.

 

Volcanoes consists of

  1. Magma chamber: A large underground pool of molten rock found beneath the surface of the Earth.
  2. Lava: Hot molten magma when it reaches the surface.
  3. Pyroclastic Flow – Pyroclastic flows are fast moving currents of hot gas and rock with travel downhill from a volcano, reaching speeds of 700 km/hour. The gas can reach temperatures of more than 1,000 degrees C, and is one of the greatest dangers from volcanic eruptions.
  4. Vent: An opening which allows hot magma, ash and gases to escape.
  5. Crater: A bowl-shaped opening at the top of a volcano
  6. Ash cloud: Clouds of steam, gases and hot ash that is spewed out from a volcanic eruption.
  7. Volcanic bombs: A mass of molten rock that are ejected during a volcanic eruption.
  8. Secondary Vent – On large volcanoes, magma will reach the surface through several different vents, and not just the main vent. This can form cones, eject lava, and cause destruction.
  9. Secondary Cone – Secondary cones build up around secondary vents on larger volcanoes.

How to use Mind maps?

  1. Use Mind maps to read the topics faster with a complete topic coverage.
  2. Try to write sentences or paragraphs using Mind maps. This will help you to write better in your Mains examination. It also aids in engraving the topic better in your mind.
  3. Use them as flash cards to revise topics.
  4. Download the images into your devices to study in your leisure times or while travelling.
  5. Use Mind maps to read and revise faster during last minute preparations.

Connect with facebook page to get regular updates on new mind maps:  https://www.facebook.com/mindmapcharts/

For any other queries kindly mail to:  mindmapcharts@gmail.com