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TECTONIC PLATES VOLCANOES AND EARTHQUAKES, inglese tectonic plates -…
TECTONIC PLATES VOLCANOES AND EARTHQUAKES
Four different layers
INNER CORE
a ball of solid iron
temperature extremely hot
2400 kilometres in diameter
OUTER CORE
liquid iron
2300 kilometres thick
MANTLE
molten or semi-molten rock
2900 kilometres thick
CRUST
top layer
40 kilometres thick
1960
scientists discovered that the Earth's crust consists of large, separated pieces called
TECTONIC PLATES:
seven or eight very large plates an several smaller ones
always moving
continents have changed their position
America is moving slowly away from Europe and Africa
dramatic geological events
mountains were formed during a collision of plates
1 more item...
NEW ZELAND
group of islands on the boundary between the Pacific Plate and the Australian Plate
Mountains= Southern Alps= formed by tectonic plate collisions.
frequent earthquakes and active volcanoes
2011
earthquake damaged 100000 buildings in Christchurch= New Zeland's largest cities
2012
Mount Tangariro= volcano in the Tongariro National Park, erupted for the first time in 100 years
Natural disasters frequent
around the Pacific Ocean
Japane
Chile
Philippines
Edge of the Pacific Ocean
'Ring of Fire'
75% of the world's active volcanoes
in this area
90% of the world's earthquakes
happen there
exists because it follows the boundary of the tectonic Pacific Plate
