5700125
Description
Mind Map by aliciajohnson123, updated more than 1 year ago
|
Created by aliciajohnson123
about 8 years ago
|
|
Plate Tectontics
- The Structure Of The Earth
- The inner core is the hottest part of the
Earth, which is solid and made up of Iron and
Nickel, with temperatures of up to 5,500°
- The outer core is a liquid
layer also made up of iron
and nickel with similar to the
inner core
- The mantle is a layer of molten rock called magma which has
a diameter of 2,900 km. The upper part is hardened and the
lower part is soft beginning to melt.
- The crust is the very outer layer of the
Earth which is a solid rock and a thin layer
of about 0-60 km. There are two types of
crust: continental crust which carries land
and oceanic crust which carries water.
- The crust is the very outer layer of the
Earth which is a solid rock and a thin layer
of about 0-60 km. There are two types of
crust: continental crust which carries land
and oceanic crust which carries water.
- The mantle is a layer of molten rock called magma which has
a diameter of 2,900 km. The upper part is hardened and the
lower part is soft beginning to melt.
- The outer core is a liquid
layer also made up of iron
and nickel with similar to the
inner core
- The inner core is the hottest part of the
Earth, which is solid and made up of Iron and
Nickel, with temperatures of up to 5,500°
- Plate Boundaries
- The Earths crust is broken up into pieces called plates.
Heat rises in the mantle to cause convection currents by
radioactive decay which move the plates. If the
convection currents are moving inwards this causes
plates move towards each other. If the convection
currents move outwards the plates move away from
each other.
- Earthquakes and volcanoes usually occur on
plate boundaries, this is the point at where two
plates meet.
- As the plates move apart slowly, magma rises from the mantle.
The magma erupts to the surface of the Earth. This is also
accompanied by earthquakes. When the magma reaches the
surface, it cools and solidifies to form a new crust of igneous
rock. This process is repeated many times, over a long period of
time.
- At a constructive plate boundary the plates move
away from each other. At a destructive plate
boundary the plates move towards eachother (can
be known as a collision plate boundary). At a
conservative plate boundary the plates slide past
each other.
- At a constructive plate boundary the plates move
away from each other. At a destructive plate
boundary the plates move towards eachother (can
be known as a collision plate boundary). At a
conservative plate boundary the plates slide past
each other.
- Constructive boundaries tend to be found under the
sea, e.g. the Mid Atlantic Ridge. Here, chains of
underwater volcanoes have formed along the plate
boundary. One of these volcanoes may become so
large that it erupts out of the sea to form a volcanic
island, e.g. Surtsey and the Westman Islands near
Iceland.
- As the plates move apart slowly, magma rises from the mantle.
The magma erupts to the surface of the Earth. This is also
accompanied by earthquakes. When the magma reaches the
surface, it cools and solidifies to form a new crust of igneous
rock. This process is repeated many times, over a long period of
time.
- Earthquakes and volcanoes usually occur on
plate boundaries, this is the point at where two
plates meet.
- The Earths crust is broken up into pieces called plates.
Heat rises in the mantle to cause convection currents by
radioactive decay which move the plates. If the
convection currents are moving inwards this causes
plates move towards each other. If the convection
currents move outwards the plates move away from
each other.
- Compressional Boundary
- At a compressional or
destructive boundary the
plates are moving towards
each other. This usually
involves a continental plate
and an oceanic plate
- The oceanic plate is denser than the
continental plate so, as they move
together, the oceanic plate is forced
underneath the continental plate. The
point at which this happens is called the
subduction zone
- As the oceanic plate is forced below the continental
plate it melts to form magma and earthquakes are
triggered. The magma collects to form a magma
chamber. This magma then rises up through cracks in
the continental crust. As pressure builds up, a volcanic
eruption may occur
- As the oceanic plate is forced below the continental
plate it melts to form magma and earthquakes are
triggered. The magma collects to form a magma
chamber. This magma then rises up through cracks in
the continental crust. As pressure builds up, a volcanic
eruption may occur
- As the plates push together, the continental crust is
squashed together and forced upwards. This is called folding.
The process of folding creates fold mountains.
- Fold mountains can also be formed where two
continental plates push towards each other. This is
how mountain ranges such as the Himalayas and
the Alps were formed
- Fold mountains can also be formed where two
continental plates push towards each other. This is
how mountain ranges such as the Himalayas and
the Alps were formed
- At a compressional or
destructive boundary the
plates are moving towards
each other. This usually
involves a continental plate
and an oceanic plate
Media attachments
Want to create your own Mind Maps for free with GoConqr? Learn more.