1. OUR CHANGING EARTH

2. LITHOSPHERIC PLATES

3. EVOLUTION OF LANDFORMS

4. 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.

5. CAUSES Endogenic forces produce slow and sudden movements. Sudden changes cause EARTHQUAKES & VOLCANOES

6. VOLCANO A VENT OR OPENING IN THE EARTH’S CRUST THROUGH WHICH MOLTEN MATERIALS ERUPTS SUDDENLY.

7. EARTHQUAKE When the Lithospheric plates move,the surface of the earth vibrates. These vibrations are called EARTHQUAKES.

8. Earthquake hits Bhuj 26 th January 2001

9. EARTHQUAKE PREPAREDNESS

10. SEISMOGRAPH

11. 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.

12. WORK OF A RIVER

13. FLOOD PLAINS

14. DELTA

15. WORK OF SEA WAVES

16. WORK OF ICE

17. WORK OF WIND