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Chapter 3 c 7 geography-part1 pdf
Chapter 3 c 7 geography-part1 pdf
The lithosphere is broken into a number of
plates known
as the Lithospheric plates.
these plates move around very slowly –
just a few
millimetres each year. This is because of
the movement
of the molten magma inside the earth. The
molten magma inside the earth moves in a
circular manner as shown in the activity.
The movement of these plates
causes changes on the surface
of the earth. The earth
movements are divided on the
basis of the forces which cause
them. The forces which act in
the interior of the earth are
called as
Endogenic forces and the
forces that work on the
surface of the earth are called
as Exogenic forces.
Chapter 3 c 7 geography-part1 pdf
Endogenic forces
sometimes produce
sudden movements and
at the other times
produce slow
movements. Sudden
movements like
earthquakes and
volcanoes cause mass
destruction over the
surface of the earth.
Diastrophic forces refer
to forces generated by the
movement of the solid
material of the earth's crust.
All the processes that move,
elevate or build portions of
the earth's crust come
under diastrophism. ...
epeirogenic processes
involving uplift or warping of
large parts of the earth's
crust.
A volcano is a vent (opening)
in then earth’s crust through
which molten material erupts
suddenly Similarly.
Chapter 3 c 7 geography-part1 pdf
when the Lithospheric plates move, the
surface of the earth vibrates. The vibrations
can travel all round the earth. These vibrations
are called earthquakes . The place in the
crust where the movement starts is called
the focus. The place on the
surface above the focus is called the
epicenter.
Vibrations travel outwards from the epicentre
as waves.
Greatest damage is usually closest to the
epicenter and
the strength of the earthquake decreases
away from the centre.
Chapter 3 c 7 geography-part1 pdf
Seismograph
•Epicenter
•Seismography
•Richter Scale
Chapter 3 c 7 geography-part1 pdf

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Chapter 3 c 7 geography-part1 pdf

  • 4. The lithosphere is broken into a number of plates known as the Lithospheric plates. these plates move around very slowly – just a few millimetres each year. This is because of the movement of the molten magma inside the earth. The molten magma inside the earth moves in a circular manner as shown in the activity.
  • 5. The movement of these plates causes changes on the surface of the earth. The earth movements are divided on the basis of the forces which cause them. The forces which act in the interior of the earth are called as Endogenic forces and the forces that work on the surface of the earth are called as Exogenic forces.
  • 7. Endogenic forces sometimes produce sudden movements and at the other times produce slow movements. Sudden movements like earthquakes and volcanoes cause mass destruction over the surface of the earth.
  • 8. Diastrophic forces refer to forces generated by the movement of the solid material of the earth's crust. All the processes that move, elevate or build portions of the earth's crust come under diastrophism. ... epeirogenic processes involving uplift or warping of large parts of the earth's crust.
  • 9. A volcano is a vent (opening) in then earth’s crust through which molten material erupts suddenly Similarly.
  • 11. when the Lithospheric plates move, the surface of the earth vibrates. The vibrations can travel all round the earth. These vibrations are called earthquakes . The place in the crust where the movement starts is called the focus. The place on the surface above the focus is called the epicenter. Vibrations travel outwards from the epicentre as waves. Greatest damage is usually closest to the epicenter and the strength of the earthquake decreases away from the centre.