Plate boundry types

Question 1

names of the plates?

Answer 1

(14 plates)
North American plate
South American plate
Eurasian plate 
African plate 
Australian plate
Antarctic plate
Pacific plate 
Arabian plate
Indian plate 
Phillipene sea plate 
Nazca plate 
Cocos plate
Carriabean plate 
Juan de fluca plate

Question 2

tectonic plates

Answer 2

oceanic crust

continental crust

Question 3

oceanic crust

Answer 3

found beneath our oceans and it is between 5km and 10km thick.
heavy and dense

Question 4

continental crust

Answer 4

found beneath our land, and it is between 25km and 100km thick.
lighter less dense

Question 5

different tectonic plates

Answer 5

Destructive plate boundries
Constructive plate boundries
Conservative plate boundries
collision plate boundries

Question 6

Destructive plate boundries ___/—-

Answer 6

Two plates push together or converge and land is destroyed.
The denser plate (oceanic) subducts (goes below) beneath the less dense plate (continental).

As the oceanic plate sinks it rubs into the mantle causing friction, melting the plate and creating magma.
As this magma pushes to the surface due to intense pressure, volcanoes are created
Earthquakes are also felt due to the stress caused by the friction

Question 7

constructive plate boundries —< >—-

Answer 7

Plates are separating by moving away from each other.
As the plates move apart, magma from the mantle can reach the surface and erupt through fissures and faults (splits in the ground) causing volcanoes and creating new land.
Earthquakes are also felt here due to the stress caused by the friction

Question 8

conservative plate boundries //

Answer 8

Plates are sliding past each other slowly.
Plates may be moving in the same direction or in the opposite direction, at different speeds.
As the plates move past each other, their rough edges snag and stick which causes friction and stress to build up until one plate ‘snaps’ and jolts forward.
This causes violent earthquakes but NO volcanoes.

Question 9

collision plate boundries –^^–

Answer 9

Two plates push past each other or converge
Both plates are the same density (both are oceanic or continental)
Therefore, subduction does not take place, instead the plates collide and push against each other
The collision causes land to squeeze upwards and fold mountains are formed as the ground buckles and reshapes under pressure
Server earthquakes can occur here, but no volcanoes