Earth as a Planet, Geographic Grid: Latitudes and Longitudes, Rotation and Revolution, Structure of the Earth, Landforms of the Earth, Rocks, Volcanoes, Earthquakes, Weathering and Denudation, Hydrosphere, Atmosphere, Insolation, Atmospheric Pressure and Winds, Humidity, Pollution and its Sources, Effects of Pollution and Preventive Measures, Natural Regions of the World, Sample Question Papers