Class 10 Elective Geography Chapter 1 Physical Geography

Class 10 Elective Geography Chapter 1 Physical Geography Question answer to each chapter is provided in the list so that you can easily browse throughout different chapters Assam Board HS Class 10 Geography Elective Chapter 1 Physical Geography and select needs one.

Class 10 Elective Geography Chapter 1 Physical Geography

Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam Board Class 10 Geography Elective Chapter 1 Physical Geography Solutions for All Subjects, You can practice these here.

Physical Geography

Chapter : 1

TEXTUAL QUESTION ANSWER

1. What is landform?

Ans: The features present over the earth’s surface area called landform.

2. Define geomorphology?

Ans: A particular branch of geography studies about the origin , evolution morphology and distribution of the landforms is know as geomorphology.

3. Write down the meaning of the geographic processes? 

Ans: The landforms develop on the surface of the earth as a result of interaction of these two types process. these processes involved in the creation of landforms are collectively called geomorphic processes.

4. Mention the exogenic processes or factors? 

Ans: The exogenic processes or factors the principal once are wind, rainfall, river glaciers ocean waves and currents.

5. What do you mean by term ‘deflation’?   

Ans: The sand and small rock particles are easily carried away by the wind in desert due to thin vegetative cover and sand surface. In this way, some areas of the desert are relatively lowered by the wind, action are this process is called deflation.

6. What is inselberg? Explain with diagram?

Ans:The inselberg is an isolated low hillock. The upper part of inselberg is steep due to high intensity of wind action in this part than on its lower part.

7. What is oasis? What is it’s significance ?

Ans: As a result of transportation of materials to other parts, some areas may be lowered down almost to the level of underground water giving rise to some depressions, which are then termed as oasis. Some vegetations grow in oasis and little amount of agriculture is also done here.

An oasis is any area in a desert that has a supply of freshwater and where plants can therefore grow. Oases provide rest, shade, food, and water for nomads as they travel their territory and to other people following trade routes. 

8. What are sand dunes ? How are they formed ?

 Ans: The deposits of sand may take the form of hills in due course of time. Such hill-like sand deposits are known as sand dunes. The shape and size of the sand dunes vary in time and over space. Some sand dunes are formed longitudinally along the direction of wind. 

9. What is abrasion ? What are the features formed due to abrasion ?

Ans: Such erosion caused as a result of friction is called abrasion. 

Abrasion process is responsible for creation of inselberg, yardang and other kinds of erosional features.

10. Define attrition ?

Ans: Attrition is an another process of wind crosion in desert. The  process by which the sand and rock particles are broken into smaller pieces through their mutual collision is known as attrition.

11. What is glaciers? What is the reason for their slow movement?

Ans: The slow moving snow and ice blocks when come down the slope are called glacier.

The glaciers flow down due to downward pressure of the snow deposits of the upslope zone on the one hand, and the force of gravity on the other hand, Presently about 1 percent of the earth’s land area is under the impact of glacial actions.

12. What are the different types of glaciers? Write briefly about each of them?

Ans: The glaciers can be divided mainly into three types based on the situation and environment of the continental glaciers. These glaciers move downslope very slowly according to the surface gradient.

(b) Mountain glaciers: These glaciers originate in the high altitude regions of the mountains. They are found mostly in the Alps of Europe, the Rockies of North America and the Himalayas of Asia. Generally they flow through the valleys confined between two mountain ranges. They are comparatively little faster than the continental glaciers.

(c) Piedmont glaciers: Sometimes a number of mountain or valley glaciers move downward and meet at the foot of the mountains. Thereafter they flow further down and cover extensive areas of the nearby plains. As these glaciers originate in the piedmont zone of the mountains, they are called piedmont glaciers. Such piedmont glaciers are common in Alaska of North America.

13. Draw a figure to slow the shape of the glacier valley.

Ans:

14. What is hanging valley ?

Ans: The valley of the tributary glacier is called hanging valley.

15. What are moraines? What are their different types? Show the location of different moraines with the help of a figure?

Ans: All such materials or sediments are collectively known as moraines.

(a) Group morain: The morains which move along the bottom bed of the glacier valley are know as group of moraines.

(b) Lateral morain: The lateral morain is a ridge of glacier debris which are formed along the sides parallel to the glacier valley. example morains clearly seen on a side glacier of the gorner glacier zermatt, switzerland.

16. Based on your general knowledge State how global warming may have it’s  various effects on glaciers ?

Ans: Global warming has led to an incredible increase in earth’s temperature.

The increased emissions of greenhouse gases such as chlorofluorocarbons, methane, carbon dioxide, nitrous oxide, sulphur  hexafluoride nitrogen trifluoride.

Global warming means an increase over a period of the average temperature of the earth is attributed to be the main reason for this phenomenon the negative  impact  of global warming is that it may greatly affect glacier of the polar regions as well as those of the high mountain range of the world. it has been proved that the polar ice beginning to melt mainly due to the High rate of global warming leading to rising level of seawater. This can cause floods, destruction of mine life and thus upset the existing ecological branch. 

Similarly currently there is a view that the Himalayan snow may also melt sooner than expected. Such a situation in the near future will be serious repercussions particular in the India . Glacier are the best sources of fresh water resources in the world to great extent and thee by effect the very existence of terrestrial life on earth However the scientist are of the opinion that the existence, location and process of the glaciers will be greatly affect by the global warming taking place in recent years.