Hazardous Eath Plate boundarirs

Question 1

Divergent (Constructive) Plate Boundary

Answer 1

Plates Move apart At MID-OCEAN RIDGES
MAGMA rises through ASTHENOSPHERE onto the SEA FLOOR the ERUPTION OCCURS the MAGMA is cooled RAPIDLY -Forms PILLOW LAVAS
MAGMA continues to RISE to LITHOSPHERE putting it under EXTREME PRESSURE which PRODUCES UNDERWATER RIFT VALLEYS

Question 2

Mid-Ocean Ridge

Answer 2

Depth of 2.5km
Long CHAINS of MOUNTAINS rising ABOVE the SEA BED
They are NOT CONTINUOUS and BROKEN in SEGMENTS by TRANSFORM FAULTS -there is no VOLCANIC ACTIVITY here
However ENERGY can Be RELEASED can cause EARTHQUAKES
SEA WATER can SEEP into MID-OCEAN RIDGES and be SUPERHEATED CHANGING the CHEMISTRY

Question 3

Named example Divergent Plate Boundary

Answer 3

Mid Atlantic-Ridge
EURASIAN moves away from NORTH AMERICA PLATE

Question 4

Convergent Plate Boundaries types

Answer 4

Oceanic -Oceanic
Oceanic -continental
Continental Continental

Question 5

Convergent Plate Boundary -Oceanic-Continental

Answer 5

When Two Plate collide TOGETHER
The Denser of the Plate will SUBDUCT, which creates an OCEAN TRENCH
The SEDIMENTS and ROCK CRUMPLE on the Oceanic Plate which UPLIFTS the CONTINENTAL PLATE where
MOLTEN MATERIAL is INJECTED into it - creates MOUNTAIN CHAINS
FAULTING and FRACTURING occurred in the BENIOFF ZONE -which RELEASES ENERGY creating EARTHQUAKES

Question 6

Convergent Plate Boundary Oceanic-Continental - Example

Answer 6

Andes in Pacific Coast of South America

Question 7

Convergent Plate Boundary- Oceanic Oceanic

Answer 7

The Denser of the Two Oceanic Plates Subducts
The SUB-DUCTED PLATE MELTS causing MAGMA to Rise, which FORMS VOLCANIC ISLANDS - ISLAND ARCS

Question 8

Convergent Plate Boundary- Oceanic Oceanic Example

Answer 8

NORTH AMERICA PKATE SUB-DUCTS under CARIBBEAN PLATE - creates ANTILLES

Question 9

Convergent Plate Boundary- Continental Continental

Answer 9

Two Continental Plates CONVERGE very LITTLE if ANY SUBDUCTION
DUE to them having SIMILAR DENSITIES

Question 10

Convergent Plate Boundary- Continental Continental Example

Answer 10

African and Eurasian plates CREATED the ALPS