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crossword puzzle for sea-floor spreading

Teacher: Micah Hellwig
Across
Beneath or within the Earth's crust from which igneous rock is formed
is the part of Earth's lithosphere that surfaces in the ocean basins
deepest parts of the ocean, also called submarine valleys
a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity
convergent boundaries by which one tectonic plate moves under another tectonic plate
created by seafloor spreading is usually rocky and dark—magma cooled by cold seawater
Ocean crust found in Greenland
Another term for core sample
Down
Is a mountain range on the floor of the world's oceans
the surface of the Earth that is about 35 kilometers thick and includes the land masses and the solid rock below them
stripes of alternating normal and reversed polarities of ocean crust
technique that uses sound propagation to navigate, communicate with or detect objects on or under the surface of the water