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GEOGRAPHY: SECTION 1: 2 QUESTIONS:
PATTERNS & PROCESSES IN THE PHYSICAL ENVIRONMENT:

VOLCANOES: at destructive plate boundarys(African-eurasian)mt.etna
Oceanic plate subducts under continental plate:
Magma,gases,silica content:build up of pressure:dust,ash,lava:

Volcanoes at contrucitve plate boundarys:(north America-eurasian)surtsey,iceland
Crust forced apart,convection currents by magma flowing:
Low silica content(runny):expanding gases,lava,rock particals:

Volcanoes at hot spots:pacific plate:mauna lua,Hawaii:
High thermal activites:rising magma:
Away from plate boundarys:

Resulting structures from volcanic activitys:
Volcanic cones, fissure eruptions, geysers,hot springs:

Benefits of volcanic activitys:
New land,fertile soils, energy(geysers), tourism(mt.etna)

Volcanic activity in Ireland:antrim derry plateau(basalt)

EARTHQUAKES:
Seismic waves(3)primary,secondary,long ,waves:
Focus=start: epicentre=point on surface: isoseial lines=intensity of waves.

Most occur at plate boundarys-destructive boundaries.

Richter scale=energy: mercalli scale=strength.

Causes-landslides,avalanches,tsunamis:Tsunami-tidal wave.


ROCKS: Folding-anticline(top) syncline(downfold) limb(sides of fold)
Exmp:fold mountains,caledonian-Donegal mts, alpine-himalayas.
Land forms:rift valleys,block mountains.

Rock groupings- igneous-sedimentary-metamorphic.
Rock cycle-stage 1-magma solidifies to from igneous:granite(building materials)
Stage 2-weathering &erosion to form sedimentary(limestone)
Stage 3-change,metamorphic (marble)

Benefits of rocks(energy sources,construction,metallic minerals)

REGIONAL GEOGRAPHY:

A region is an area which has a certain...