Plate Tectonics

Front 1

constructive plate boundaries

Back 1

at a constructive or divergent plate boundary two plates move apart from each other.
as the plates move apart, magma rises through the gap in the Earths crust and cools down to form new crust.
an example of a constructive plate boundary is the
MID-ATLANTIC RIDGE.

Front 2

destructive plate boundaries

Back 2

at a destructive or convergent plate boundary, two plates move towards each other.
when an oceanic plate moves towards a continental plate, the denser oceanic plate sinks below the continental plate. when the oceanic plate sinks it melts and forms magma.
at a destuctive plate boundary, the movement of the plates might push the continental crust upwards to form fold mountains. Process= FOLDING
an example of a destructive plate boundary is in JAPAN

Front 3

conservative plate boundaries

Back 3

at a conservative or ransform boundary, the plates move horizontally past each other without creating or destroying the Earths crust.
an example of a conservative boundary is the San Andreas Fault, USA

Front 4

subduction zone

Back 4

when the denser oceanic plate sinks below the continental plate.

Front 5

composite volcano

Back 5

some are composed (made up) of lava and ash; others are made up of lava only. composite volcanoes are made up of alternating layers of lava and ash. others are made from lava only.

Front 6

shield volcano

Back 6

tend to be found at constructive plate boundries. low with gentle slopes. formed by basic lava, which is thin and runny. basic lava spreads quickly to form low, shield-shaped volcanoes. Erupt frequently and gently.