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Section 17.3

Across
Large isolated chimney like columns of ascending hot rock
Molecules in the rock move back and forth in the same direction
Two continental plates collide
Place where subsurface molten rock breaks through to Earth's surface
A few thin rigid crustal and upper mantle material are moved across earth's surface
Like water waves in which the molecules move up and down
Down
Volcanoes form above me, when heated plate material partially melts
Formation of new crust along volcanic spreading ridges
Hawaii, Yellowstone Park, Iceland
Heated rock expands and cooling rock contracts changes that cause solid formation.
Enables geophysicists to obtain astonishing three dimensional pictures of earth's interior
Study of measurement of sound vibrations within Earth, also dedicated to deducing our planets inner earth