Contents Earth Processes The various processes that take place over and beneath the earth's surface have been explained under this topic. You will learn about how various landforms are formed by rivers, wind, glacier and sea. Atmosphere This section gives you a clear picture about the air around us. You will also learn about the processes that create the different climatic and weather conditions experienced in various parts of the earth. Hydrosphere This topic provides you with a plethora of information on water bodies, tides, waves and ocean currents. These concepts have been made simple using maps and animated images which make the lesson easy to understand. Our Environment Human beings have lived in harmony with nature ever since they evolved on earth. This unit explains how humans interact with their surroundings. Case studies on different regions of the world having varying environmental conditions show how people adapt to their natural environment. India India is our country. This unit informs you about India's location, political and physical divisions, climate, soil types, natural vegetation and wildlife. Learning about these will help you appreciate the fact that in spite of the diversities, India is united as a nation.