plate tectonics

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the most violent shaking of an earthquake would be a number

10

transform boundary

plates slide/grind past each other

evidence of continental drift

same type of rock scrape

continental drift was found on the continents

south america and africa

the plunging of the ocean floor back into the interior of the earth is called what?

subduction

most of the damage during an earthquake is caused by

surface waves (l waves/raliegh waves)

compared to earths ocianic crust earths continental crust is

thicker and composed of granite

two plates that grid past each other are called

transform boundary

converging plate boundary

PLATES MOVING TOWARD EACH OTHER when two plates carrying continents collide the continental mantle is uplifted

the shaking that results from the sudden movement of the earths crust is called an

earthquake

the study of seismic waves change as they travel through earth has revealed that

earths outer core is liquid because s-waves are not transmitted through this layer

during an earthquake the most violent shaking occurs at the

epicenter

the point between the surface where rocks break and move is an earthquakes

focus

evidence of continental drift

fossil evidence

the layer of the earth with the hottest temp and most intense pressure is called

inner core

ny does not experience many strong earthquakes because

its not along a plate boundary

what is convection?

material in the mantle is heated causes plates to move. (heat rises cools sets)

the youngest rock on the ocean floor are found at

mid ocean ridges

which two features are commonly found at divergent plate boundaries?

mid-ocean ridges and rift valleys

Diverging plate boundary

MOVING APART

what travels faster, P waves or S waves?

P waves

what is sea floor spreading?

divergent plate boundaries formed mid ocean ridges

the convection currents responsible for moving tectonic plates occur in which earth layer?

asthenosphere

which part of the earths interior is inferred to have convection currents that cause tectonic plates to move

asthenosphere

the plates of the lithosphere float on a hot zone of plastic rock called the

asthenosphere (upper mantle)

the youngest rocks are found closest to what?

closest to boundrys

the movement of tectonic plates is inferred by many scientists to be driven by

connvection currents in the asthenosphere

the movement of material caused by differences in temp and density is called

convection

where do trenches form?

convergent boundary

mountains are usually formed at a

converging boundary

subduction occurs at

converging boundary

the least dense layer of the earth is called the

crust

the layer of the earths crust that is liquid is called the

outer core

according to the theory of continental drift the continents were once part of a large land mass called

pangaea

pieces of evidence that support the theory of continental drift

pieces fit together perfectly


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