Earth Sciences

What is lava?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. Lava is the molten or melted rock that is forced from volcanoes and cracks within the Earth's surface, as well as what is left behind once it cools and hardens. Cooled lava has formed many mountains and island chains, and much of it eventually becomes lush and productive soil. Lava is made up of mostly silicon dioxide, and geologists believe magma (the term used to describe the molten rock deep with the Earth) is created under extreme pressure and temperatures at great depths below the Earth's crust. When a volcano erupts, molten rock is forced up through the Earth's crust and expelled out as lava, which can reach temperatures as high as 2,000 degrees Fahrenheit (1,200 degrees Celsius).

    More answers from Discovery Channel »

Still Curious?
  • Which are the most famous caves in North America?

    Answered by Discovery Channel

  • Can we manufacture water?

    Answered by Discovery Channel

  • What is erosion?

    Answered by Discovery Channel


What are you curious about?

Image Gallery