<span>In a volcano, you can observe a crack on the surface of the earth, from which molten lava comes out. The earth's crust basically breaks, and the high temperature and pressure melts the rocks present deep in the earth, which comes out during a volcanic eruption.</span>
They are narrower than the ones if the Atlantic and are not covered with thick layers of sediment.
Answer:
Well, Jupiter and Saturn are mostly comprised of Hydrogen and Helium.
Neptune on the other hand is made mostly comprised of Methane.
and Uranus is made of..................................................................................................................................................................................................
Methane as well