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Earth Science - tectonic plates

Across
The layer of mantle closest to the core.
Another name for equipment which detects and measures earthquake waves.
...wave. This is the slowest of the three type earthquake waves. But it does the most damage.
...Drift: Alfred Wegener, a German meteorologist & geophysicist, proposed Pangaea and a view that the continents slowly drifted apart.
Similar to a dip-slip fault, except the plate moving moves up, rather than down.
The outer later of the earth, covering just a few miles... about 75 miles maximum.
The innermost portion of the earth, composed mainly of iron and some nickel.
A theory proposed by Alfred Wegener that there was once one "super-continent" which formed about 200 - 300 million years ago. It has slowly broken into a few continents, separating at the tectonic plates of those continents.
A plate which is underneath a portion of the earth's crust and upper mantle.
The portion o the earth directly underneath the crust.
The layer of mantle closest to the crust.
Down
The 2nd arriving earthquake wave, which is transverse, meaning it vibrates matter at right angles to the direction it is moving. These waves cannot move through liquids.
Outside of the inner core is the ____ core. It consists mainly of iron, and some nickel.
An earthquake fault in which the tectonic plate moves sideways, along the strike line. The San Andreas fault-line in California is this type.
Equipment which detects and measures earthquake waves.
...hypothesis. The idea that our solar system was slowly formed (billions of years) from a cloud of dust and gas called a nebula. These particles were pulled together by gravity and formed our present planets and sun.
The fastest of the three earthquake waves, which consists of longitudinal waves.
Layers of rock and sediment.
...column. The belief that rocks are a record of earth's history, with very old dates (deep time) size an extremely long time would be needed for the layers of strata to be laid down.
The normal earthquake fault.