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Unit 5 Vocabulary Preview

Across
A supercontinent containing all of Earth's land that existed about 225 million years ago.
The region where oceanic plates sink down into the asthenosphere.
The idea that the more dense edge of a plate is pulled under a less dense edge of another plate
A process where newly formed crust at the mid-ocean ridge pushes older crust away
Magma that aches the Earth's surface
The movement of substances due to differences in density. Less dense move up while more dense move down
A plate boundary where two plates move toward each other.
A circle of volcanoes surrounding the Pacific Ocean.
The hypothesis that the continents slowly move across Earth's surface.
An underwater mountain chain where new ocean floor is formed
Down
Molten rock beneath the earth's surface
The boundary between tectonic plates that are sliding past each other horizontally
Preserved remains of once-living organisms
The process that creates new sea floor as plates move away from each other at the mid-ocean ridges
A theory stating that the earth's surface is broken into plates that move.
The point where two tectonic plates meet
Sections of the Earth's crust that move due to convection currents.
A plate boundary where two plates move away from each other.