SOLAR SYSTEM

Detailed explanation-1: -As a magma cools below 1300°C, minerals start to crystallize within it. If that magma is then involved in a volcanic eruption, the rest of the liquid will cool quickly to form a porphyritic texture.

Detailed explanation-2: -As the temperature drops, usually because the magma is slowly moving upward, things start to change. Silicon and oxygen combine to form silica tetrahedra, and then, as cooling continues, the tetrahedra start to link together to make chains ( polymerize ).

Detailed explanation-3: -Igneous Rock Molten material within the Earth is called magma. In simple terms magma can be thought of as molten rock. When magma cools, it solidifies to form rock which is called “igneous rock". That is deceptively simple, since the solidification process can be very complex.

Detailed explanation-4: -Once minerals begin to form in a melt, they start to settle downward due to the influence of gravity. Minerals as solid substances tend to have higher specific gravities than the magma that they are crystallizing from. Hence they sink downward. The process is called gravitational settling (See adjacent sketch).