Big Bang Theory
Big bang theory is the moat popular argument on the origin of universe. Big bang theory is the phenomena of the expandation of universe by which highest density particle collide or combine into low density particles.
Interior of The Earth
The outermost solid part of the Earth is called crust. The thickness of crust is 30km on the plain Land, whereas 5km and 70km of the oceanic and mountain region respectively.
It is the part beyond inside the crust is called Mantle. It’s depth is near 2,900 km.
The core boundary is located at the depth of 2,900 km. The core is in liquid state from outer side and in solid state in inner side.
It is a place where gases with molten rocks material (called lava) comes out from ground. The mantle contains the weaker zone called Asthenosphere, from which the molten rocks material comes out. The upper mantle portion is called Magma. Some types of volcanoes are given as: Shield volcanoes, Composite volcanoes, caldera, mid ocean ridge volcanoes.
The lava that is comes out during the volcanic eruptions converted into igneous rocks on cooling.