Potential difference.
Igneous rocks form when magma (molten rock) cools and solidifies either beneath the Earth's surface (intrusive) or on the surface (extrusive). The rate of cooling and the mineral composition of the magma influence the texture and characteristics of the resulting igneous rock.
Because that is the very definition of igneous rock.
An igneous or sedimentary rock can become metamorphic through heat and pressure deep within the Earth's crust. This process causes the mineral composition and texture of the rock to change without melting completely, resulting in a new metamorphic rock.
The difference in temperatures between the Equator and the north and south poles, plus the rotation of the earth, causes the air currents.
A vesicular texture is one where there are small voids within the igneous rock. These tend to form in extrusive igneous rocks due to the loss of confining pressure which causes gasses dissolved in the molten material to come out of solution or exsolve. These gasses form bubbles within the cooling lava and can become trapped if the lava cools rapidly, leaving a permanent gas bubble or void space within the solidified igneous rock.
Potential difference.
Igneous rocks form when magma (molten rock) cools and solidifies either beneath the Earth's surface (intrusive) or on the surface (extrusive). The rate of cooling and the mineral composition of the magma influence the texture and characteristics of the resulting igneous rock.
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Because that is the very definition of igneous rock.
Melting causes an igneous rock to form into lava/magma.
Extrusive igneous rocks can turn into metamorphic rocks through the process of regional metamorphism, where they are subjected to high temperatures and pressures deep within the Earth's crust. This causes the mineral composition and texture of the rock to change, resulting in the formation of a new metamorphic rock.
An igneous or sedimentary rock can become metamorphic through heat and pressure deep within the Earth's crust. This process causes the mineral composition and texture of the rock to change without melting completely, resulting in a new metamorphic rock.
A: difference in bias current causes the other
You would typically find rocks with vesicular texture in igneous features such as volcanic necks, lava flows, and volcanic ash deposits. Vesicles are voids or cavities left behind by gas bubbles trapped in the cooling magma.
Pottential Difference between two things.
Cooling to a solid.