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Tectonic Plates
- Earth's Surface
- Inner Core
- Centre. Hottest part of Earth.
Solid + made up of iron + nickel
with temps up to 5,500°C.
- Centre. Hottest part of Earth.
Solid + made up of iron + nickel
with temps up to 5,500°C.
- Outer Core
- Layer surrounding inner core. Liquid layer,
also made of iron + nickel. Extremely hot,
with temps similar to inner core.
- Layer surrounding inner core. Liquid layer,
also made of iron + nickel. Extremely hot,
with temps similar to inner core.
- Mantle
- Widest section of Earth. Thickness
approximately 2,900 km. Made up of
semi-molten rock - magma. Upper
parts of mantle, rock is hard - lower
down, rock is soft + beginning to melt.
- Widest section of Earth. Thickness
approximately 2,900 km. Made up of
semi-molten rock - magma. Upper
parts of mantle, rock is hard - lower
down, rock is soft + beginning to melt.
- Crust
- Outer layer of earth. Thin layer,
between 0-60 km thick. Solid
rock layer where we live.
- Outer layer of earth. Thin layer,
between 0-60 km thick. Solid
rock layer where we live.
- Tectonic Plates
- Crust - divided into lots of
slabs - float on the mantle.
- Continental Crust
- Carries land. Thicker + less
dense than oceanic crust.
- Carries land. Thicker + less
dense than oceanic crust.
- Oceanic Crust
- Carries water. Thinner + more
dense than continental crust.
- Ocean Trenches
- Very deep sections of ocean floor
where oceanic plate goes down.
- Very deep sections of ocean floor
where oceanic plate goes down.
- Carries water. Thinner + more
dense than continental crust.
- Crust - divided into lots of
slabs - float on the mantle.
- Plate Margins
- Places where plates meet.
- Places where plates meet.
- Inner Core
- Plate Margins
- Destructive Margins
- Where 2 plates are moving
towards each other, e.g.
along coast of Japan.
- 1. Oceanic meets continental plate.
- 2. Denser oceanic plate forced
down into mantle + destroyed.
- 3. Often creates volcanoes
+ ocean trenches.
- 3. Often creates volcanoes
+ ocean trenches.
- 2. Denser oceanic plate forced
down into mantle + destroyed.
- Where 2 plates are moving
towards each other, e.g.
along coast of Japan.
- Constructive Margins
- Where 2 plates are moving away from
each other e.g. at mid-Atlantic ridge.
- Magma rises from mantle to fill
gap + cools, creating new crust.
- Where 2 plates are moving away from
each other e.g. at mid-Atlantic ridge.
- Conservative Margins
- Where 2 plates are moving sideways past
each other or moving in same direction at
different speeds e.g. along west coast of USA.
- Crust isn't created or destroyed.
- Where 2 plates are moving sideways past
each other or moving in same direction at
different speeds e.g. along west coast of USA.
- Destructive Margins
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