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Transcript 
OUR CHANGING EARTH
LITHOSPHERIC PLATES
EVOLUTION OF LANDFORMS
TECTONIC FORCES
Endogenic forces – The forces that act in
the interior of the earth.
Exogenic forces - The forces that act on
the surface of the earth .
CAUSES
Endogenic forces produce slow and
sudden movements .
Sudden changes cause EARTHQUAKES
& VOLCANOES
VOLCANO
A VENT OR OPENING IN THE EARTH’S CRUST
THROUGH WHICH MOLTEN MATERIALS
ERUPTS SUDDENLY.
EARTHQUAKE
When the Lithospheric plates move ,the
surface of the earth vibrates.
These vibrations are called
EARTHQUAKES.
Earthquake hits Bhuj
26th January 2001
EARTHQUAKE PREPAREDNESS
SEISMOGRAPH
WEATHERING & EROSION
Weathering – Breaking up of the rocks on
the earth’s surface.
Erosion - is the wearing away of the
landscape by different agents like water,
wind ,ice .
WORK OF A RIVER
FLOOD PLAINS
DELTA
WORK OF SEA WAVES
WORK OF ICE
WORK OF WIND
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