10.2 (Bounderies)

Question 1

Divergent boundaries

Answer 1

-Constructive boundery
-Diverging plates move away from each other
-If this happens on the ocean floor, places called ocean ridges will form seafloor spreading
-If this happens on land, places called rift valleys form, magma rises from the asthenosphere, filling the rift and forming new crust.

Question 1

Convergent boundaries

Answer 1

-Destructive boundary
-Continental-continental convergent boundary:When two continental plates collide, rocks get pushed upwards forming large mountain ranges
-Oceanic-continental convergent boundaryWhen an oceanic and a continental plate collide, the denser oceanic crust is pushed underneath the continental crust, creating deep trenches.
This process is called subduction
-The pressure on the continental plate above creates fold mountains and active volcanoes
Oceanic-oceanicWhen two oceanic plates collide, the faster plate undergoes subduction  deep trench formed
The plate underneath melts, forming magma which rises to the surface  creates oceanic volcanos which cool to form islands arcs.

Question 2

Transforming boundaries

Answer 2

-Transform boundaries occur when plates slowly slide past each other in parallel
Pressure builds up until sudden slips cause an earthquake. Oceanic earthquakes can form tsunamis
-Fold mountains typically form along the boundary.
-Cracks in the plate along the boundaries are known as fault lines.