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Most of the ocean floor is made up of ________.

During a journey to the center of the Earth, one would experience temperature ________.

Thermal (contact) metamorphism occurs ________.

Faults that have moved recently or are likely to move in the future are referred to as ________ faults.

As compared to aphanitic igneous rocks, phaneritic rocks are ________.

Ore minerals, such as galena and hematite, tend to be different from typical minerals in that they have a ________.

Most of the pulling force driving plate motion is produced ________.

Aside from Earth, the terrestrial planets are ________.

A periodic explosive eruption of steam and water from within the ground up through the surface is termed a(n) ________.

As compared to the asthenosphere, the lithosphere is ________.