How does silica content affect the temperature at which minerals crystallize in magma? This form of molten rock is made up of dissolved gases, mineral crystals, and molten rock. Its silica content ...

Volcanoes are cracks in Earth's crust that allow molten rock and hot gases to escape. According to the U.S. Geological Survey (USGS), there are about 1,350 volcanoes worldwide that have the ...

Rare Metal The metal iridium, which is similar to platinum, is very rare on Earth's surface but is more common in asteroids and in molten rock deep within the planet. Scientists have discovered ...

which forms when two tectonic plates rub against each other and generate enough friction and heat to create magma from melted rock. This magma surges through the surface of the earth, then ...

CONNOR: The surface of the Earth is called the crust and it is made up of different plates, pieces that fit together and float about on a layer of melted rock. This liquid rock, or magma ...