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Class 10th geography Unit 1 Physical Geography Questions Answers solutions||pdf download ||
TEXTUAL QUESTIONS AND ANSWERS
Q. No 1-
8 Ans
1 What is landform?
Ans. The varied features on the surface of the earth are known as landforms. Examples of landforms includes mountains, hills, plateaus, plains, valleys, rivers, sand dunes, glaciers, oceans, etc.
2. Define
geomorphology.
Ans. The
particular branch of geography which studies the origin, evolution, morphology
and distribution of the various landforms over the earth's surface is known as
geomorphology.
3. Write
down the meaning of the geomorphic processes.
Ans. The
processes by which landforms are developed on the surface of the earth as a
result of the interaction of certain exogenic and endogenic factors are known
as geomorphic processes. For example, the works of winds and glaciers are two
geomorphic processes.
4.
Mention the exogenic processes or factors.
Ans. The
external factors or processes which bring about various of changes on the
surface of the earth are known as exogenic processes or factors. The important
exogenic factors ace sunshine. wind, rainfall, rivers, glaciers, ocean waves,
currents, temperature, etc.
5. What
do you mean by the term 'deflation'?
Ans.
Deflation is the process of forming lowlands in the desert as a result of
the transportation of loose sand, dust particles and other
materials from the surface level of the desert, by the erosion activity of
wind.
Geography Class 10 Chapter 1 Question Answer.
6. What
is inselberg? Explain with diagram.
Ans.
Inselberg refers to a prominent steep-sided low hillock of solid rock, rising
abruptly from a plain of low relief, formed by the abrasion action of wind
erosion. Inselbergs have a dome-shaped cap. The upper part of inselberg is
steeper due to higher intensity of the wind here than at its lower part.
Inselbergs ace seen in deserts noted for high velocity winds.
7. What
is oasis? What is its significance?
Ans.
Oasis is a fertile area in the desert region usually having small, isolated
spring and little vegetation. With the transportation of materials to other
pans of deserts by wind, some areas may be lowered down almost to the level of
underground water giving rise to some depressions; this area is termed as
oasis.
Oasis are
patches of water and vegetation in arid and sandy land. hence their presence is
very significant in providing a place for settlement, scope for agriculture and
development of economic activities. People can also travel through deserts as
the occasional oasis gives them the required water, shade, etc.
8. What
are sand dunes? How are they formed?
Ans. Sand
dunes refer to a mound or ridge of wind-blown sand. The dunes are generally
mobile as they move with the wind. There is a wide range of variation in the
shape, size and structure of different types of sand dunes, which depend on
various factors like properties of wind, wind direction and energy, vegetative
cover, surface structure, etc.
Formation of sand dunes: There are three categories of sand dunes in deserts. These are:
A)
Longitudinal sand dunes: These sand dunes are formed longitudinally along the
direction of wind.
B)
Transverse sand dunes: These sand dunes are formed transverse to the wind
direction.
C)
Barkhans sand dunes: Some sand dunes are formed having a shape of crescent.
These sand dunes are called barkhans sand dunes.
Sand dunes are formed due to the depositional activities of wind in the desert areas. Due to deflation, the dust, sand and clay particles are carried away by the wind. In the desert areas, the wind blows with greater velocity due to the absence of any high raised landforms. But, when such wind meets an obstruction, viz. bush, a fencepost or a large rock, the speed of the wind gets reduced, and it starts depositing the sand and dust fragments on the leeward side of such obstacles. The initial deposition then acts as an obstruction which facilitates subsequent deposition. In due course of time, the area starts gaining height which results. In the formation of sand dunes. Sand dunes are predominantly found in deserts with sandstones.
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Elective Geography Class 10 Seba Question Answer English Medium
Class 10th Geography Unit 1 Physical Geography Ans Solutions
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