Allied forces developed new ______________ methods
Harry Hess was a geologist and _____ reservist.
2 miles between the waves of the pacific ocean, Harry Hess discovered __________.
In 1953 they found out what it was. A 12,000 mile long mountain range. They called it _______________________.
The Mid Ocean sits up at ____________ meters high.
The age of the Atlantic ocean floor was progressively ______________ the further it moved away from the ridge.
Hess called his great discovery ______________________.
Not only is the earth’s crust moving, but the surface of the planet is broken into large __________________ plates.
The Pacific Ocean right now has subduction all around it and the plate is being _______ and _________.
The Atlantic ocean is spreading without much _____________.
The Atlantic ocean is going to grow, the Pacific ocean is going to _________, and then we’ll start closer to ________ and closing up the Pacific ocean.
Earthquakes are really important because they’ve allowed us to define the __________ geometry and boundaries.
Before volcanoes light off, a lot of times there’s pre-eruption seismic activity. As the _______ ascends to the surface, it causes stress and the stress is released.
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