Class 9 geography subject under Board of Secondary Education, Assam (SEBA) is a part of social science and comprises of four chapters, namely Changes of the Earth’s Surface, Atmosphere: Structure, Air Pressure and Wind System, Geography of India, and Geography of Assam. Below, you will get the chapter-wise answers/solutions of all the chapters. However, these solutions can be modified/changed according to needs as these are only for references.
SEBA Class 9 Geography Chapter 1: Change of the Earth’s Surface
The surface of the Earth is composed of continents and oceans. In the continents, planes, hills and mountains, valleys, deserts and coastal plains are found to occur. Similarly in the oceans, submerged plateaus, plains, ridges, trenches, coral reefs are there. Moreover, many islands of various sizes are also found in the oceans. These features of the land surface in ocean bottoms are the results of certain process operating through the ages. In the course of time, these features experience changes. The process involved in the genesis of these features also gets changed with the passage of time. In this chapter, you will learn more about the changes and the factors behind these changes.
SEBA Class 9 Geography Chapter 2: Atmosphere: Structure, Air Pressure and Wind System
Although we cannot see, we are surrounded by air from all directions. This envelope of air around us is known as the atmosphere. The atmosphere is very important for our survival and for the survival of every living aspect of the planet. Besides the atmosphere, our lives are also dependent on the lithosphere, hydrosphere etc. In this chapter, you will learn in details about the atmosphere, lithosphere, hydrosphere, wind and other factors that make life possible on Earth.
SEBA Class 9 Geography Chapter 3: Geography of India
India is an important country situated in the northern hemisphere of the earth. It is a large democratic country full of diversities. Such diversities are apparent due to its variations in climate and physical features. There is, on the one hand, severe cold climate on the high snow-covered Himalayas and on the other, there prevails very hot climate in the desert of Rajasthan. Floods are caused due to heavy rainfall, in some places whereas some areas suffer from acute water. In this chapter, you will learn about the various physical divisions of India, the climate, etc.
SEBA Class 9 Geography Chapter 4: Geography of Assam
Assam, located in the north-eastern region, shares its boundary with seven states of India and two foreign countries- Bhutan and Bangladesh. Bhutan and Arunachal Pradesh are on the north of Assam; Arunachal Pradesh, Nagaland and Manipur are on the east; Mizoram and Meghalaya are on the south and Tripura, Bangladesh and West Bengal are on the west. Most of the areas on the boundary of Assam are hilly. Except for the border with West Bengal and the Bangladesh border of the Barak valley, all other border areas of the state are hilly. From these hills around, rivers and streams come down to join the Brahmaputra and the Barak rivers. Thus, any change in the forest cover or other components of the environment will have a direct or indirect impact on both the valleys. In this chapter, you will learn about geography as well as climate and other aspects of the state.