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the earths surface{the structure of the earth} - Coggle Diagram
the earths surface{the structure of the earth}
the structure of the earth
the mantle
the core(outer,inner)
the crust
parts of the earth
the mantle
the mantle lies under the crust(made from molten melted rock)
the core
the core is the center of the earth,hottest part,6000 deegrees
the crust
the crust is the outside layer(made of solid rock)
platers
plates with land ontop are called continetal paltes
plates with the ocean ontop are called oceanic plates
the earths crust broken to peices
the line where 2 plates meet= plate bounderies
the magma moving in circular movements=convection currents
convectio currents explained
2.when rising it cools and hardens,the frictin between the magma and the crust and pulls plates
3.magma cools and sinks back to the mantel
1.magma heats and rises towards the crust
4.this process is repeated
plate tectonics
his theory was that before all contenintes were joined together
when the contentenites broke apart he called this continental drift
1st person to come up with this was a german alfred wegener
scientests then discovered the mid-athlantic ridge[boundary where america seperated from the eurasian plate
what hapens each boundries
the heavier plates melt into the mantel
the lighter plates lift and form fold mountains
plates collide=plates collide with each other and this crust is destroyed
plates taht collide cause earthquakes and valcanos
an example=the andes
plates seperate
plates that move apart and a gap is formed
when this forms under ground this is called sea-floor spreading
plates that seperate have constructive boundries{new crust formed here}
example=iceland
sliding plates
crust is neither created or destroyed
there locked together and reales a lot of energy when moving
plates that side past eachother are callled passive boundries
create earthquakes and fault lines
example=the san andeas fault