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Plate Tectonics

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Laurianne Howe

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Cards in this guide (16)
Which type of landform develops at plate boundaries where one oceanic plate descends beneath another

A volcanic island arc

How much of an increase in wave amplitude is seen from an earthquake measuring 5.4 on the Richter scale compared to one measuring 4.4

Ten times

What are the volcanic landforms at divergent ocean plate boundaries called

The volcanic landforms at divergent ocean plate boundaries are oceanic ridges.

What are strips of alternating magnetic polarities found in rocks in the ocean basins

These stripes represent polar inversions.

What is newly formed land consisting of an arc-shaped island chain called

Volcanic island arc

Why did most scientist reject Wegener hypothesis of continental drift

Because Wegener could identify the cause of continental drift

Which was not included in the support for harry hess's hypothesis of sea-floor spreading

Granitic strips in the ocean floor ...

Novanet

What is the difference of the P waves and S waves used to locate an earthquake's epicenter

P waves, also called primary waves, are the first waves to be registered on a seismograph. The S waves, or secondary waves, are the second and slower wave to register on the seismograph. When locating an earthquakes epicenter seismologists take the first reading of the P wave, and then take the reading from the S wave. At the station of where the earthquake was recorded, seismologists draw a large circle from where the earthquakes epicenter could be. TO exactly located the earthquakes epicenter there needs to be at least 3 dfferent staions where the earthquake hit to determine its epicenter using the S and P time interval. 

Why was Alfred wegeners idea that tidal forces might cause continental drift refuted as impossible

It would stop earth's rotation.

Showed that the tidal forces needed to move continents would stop earths rotation.

According to the plate tectonic theory a plate can be made up of

Plate tectonic theory can be made up of two things. The two things that it is made of are all oceanic lithosphere or all continental lithosphere.

What was the reason wegeners continental drift hypothesis was rejected

His evidence was incorrect.

How do uplift and erosion help to form a batholith

by exposing a large body of igneous rock to the surface

The trace that records an earthquake from seismic instruments is called a

magnitude

German scientist Alfred Wegener is best known for what hypothesis

continental drift

What does most magma forms from

Magma is liquid rock from volcanoes.

How do ancient glacial deposits in Africa India Australia and South America support the idea of continental drift

G

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