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A force that slowly wears away mountains and other features on the surface of the earth
A vibration that travels through earth carrying the energy released during an earthquake
the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle
Constructive forces examples and destructive forces
A force that builds up mountains and landmasses on Earth's surface ex: The formation of the island of Surtsey is an example of a constructive force whereas the waves that wear away at the shoreline is an example of destructive forces.
the name of the single landmass that broke apart 200 million years ago and gave rise to today's continents
German Meteorologist who proposed the theory of coninental drift (the idea that the continents were moving) and had been once joined together in a single landmass
An underwater moutain chain where new ocean floor is formed; a divergent plate boundry
a device that determines the distance of an object under water by recording echoes of sound waves.
the process by which new molten material adds new oceanic crust to the ocean floor
a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
The process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary.
the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle
Canadian scientist that observed that there are cracks in the continental crust similar to those on the ocean floor
what is subduction?
the process by which the ocean floor sinks beneath a deep ocean trench and bake into the mantle
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