Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 4 Exogenetic Movements Part 2, Textbook Exercise Important Questions and Answers.
Class 9 Geography Chapter 4 Exogenetic Movements Part 2 Textbook Questions and Answers
1. Rewrite the correct statement:
Question 1.
The temperature range helps the wind in its work.
Answer:
Correct.
Question 2.
River’s work is more prominent than other agents of erosion in desert regions.
Answer:
Incorrect. Work of wind is more prominent in desert regions than other agents of erosion.
Question 3.
The work of groundwater is effective in the area with soft rocks.
Answer:
Correct.
2. Correct and rewrite the incorrect statements:
Question 1.
The ice on the lateral side of the glacier moves faster than the ice at the base.
Answer:
Incorrect. The ice on the base of the glacier moves faster than the ice on the lateral side.
Question 2.
The depositional work by rivers happens because of gentle slope, reduced speed and transported sediments.
Answer:
Correct.
Question 3.
A river flows at a faster speed than the glacier.
Answer:
Correct.
Question 4.
The speed of the glacier is more on both the banks than in the middle.
Answer:
Correct.
3. Identify the wrong pair
Question 1.
Deposition – V-shaped valley
Answer:
Wrong pair.
Correct pair is – Erosion – V-shaped valley
Question 2.
Transport – Ripple Marks
Answer:
Transport – Ripple Marks
Question 3.
Erosion – Mushroom Rocks
Answer:
Erosion – Mushroom Rocks
4. Identify and name the landforms in the following diagrams :
Answer:
(i) V-shaped valley
(ii) Gorge (Canyon)
(iii) Delta
5. Complete the following table by classifying the landforms according to their agents of erosion.
(waterfall, delta, cirque, arête, barchans, moraine, pothole, mushroom rock, sinkholes, beach, pillars, lagoons)
Rivers Wind Glacier Sea Waves Groundwater
Answer:
| Rivers | Wind | Glacier | Sea waves | Ground Water |
| Waterfall | Barchans | Cirque | Beach | Sinkholes |
| Delta | Mushroom rock | Aretes | Lagoons | Pillars |
| Pothole | Moraine |
6. Answer the following questions in brief.
Question 1.
List the landforms that are a result of the erosional work of the rivers.
Answer:
Gorges (canyons), V-shaped valleys and waterfalls are the result of the erosional work of the rivers.
(i) ‘V’ Shaped Valley:
(ii) Gorge:
(iii) Waterfall:
Question 2.
Which agent is responsible for the formation of stalactites and stalagmites and where are they formed?
Answer:
Question 3.
List the landforms that are produced by the depositional work of the sea waves
Answer:
The landforms like beaches, sand bar, lagoons are formed due to depositional work of the sea waves.
(i) Beach:
(ii) Lagoon:
(iii) Sand bars:
Question 4.
Name the types of moraines.
Answer:
The glaciers carry sediments with them. These sediments are called moraines. Depending ond the location of the deposits, moraines can be divided into 4 types: ground moraines, lateral moraines, medial moraines and terminal moraines.
7. Observe the following picture carefully. Identify the landforms formed by different agents of erosion. Number them with a pencil here and write their names in the sequence in your notebook.
(i)
Answer:
Depositional work of river
(ii)
Answer:
Depositional work of river
(iii)
Answer:
Erosional work of river
(iv)
Answer:
Depositional work of river
(2) Some pictures of the landforms formed by glaciers3 are given below. Write the function because of which they have been formed.
(i)
Answer:
Erosional work of glacier
(ii)
Answer:
Erosional work of glacier
(iii)
Answer:
Depositional work of glacier
(iv)
Answer:
Depositional work of glacier
(v)
Answer:
Erosional work of glacier
(vi)
Answer:
Erosional work of glacier
(vii)
Answer:
Depositional work of glacier
(3) Some pictures of the Iandforms produced by the work of the winds are given below. See the pictures and write in the box whether they have been formed by erosion or deposition.
(i)
Answer:
Erosional work of wind
(ii)
Answer:
Depositional work of wind
(iii)
Answer:
Depositional work of wind
(iv)
Answer:
Depositional work of wind
(v)
Answer:
Erosional work of wind
(vi)
Answer:
Erosional work of wind
(4) Some pictures of the landforms produced by the work of the sea waves are given below. See the pictures and write in the box whether they have been formed by erosion or deposition.
With the help of internet, obtain information regarding the places along the Konkan coast where you will find the landforms formed by sea waves.
(i)
Answer:
Erosional work of sea waves.
(ii)
Answer:
Depositional work of sea waves
(iii)
Answer:
Erosional work of sea waves.
(iv)
Answer:
Erosional work of sea waves.
(v)
Answer:
Erosional work of sea waves.
(vi)
Answer:
Depositional work of sea waves.
(vii)
Answer:
Depositional work of sea waves.
(5) See the pictures of the landforms produced by the work of groundwater. Write in the box below them whether they are formed through the work of erosion or deposition.
(i)
Answer:
Erosional work of ground water
(ii)
Answer:
Depositional work of ground water
Class 9 Geography Chapter 4 Exogenetic Movements Part 2 Intext Questions and Answers
Draw a diagram showing landforms at the sea coast:
Answer:
Can You Tell?
Question 1.
How will you differentiate between a rill, gully, stream and a river?
Answer:
The smallest natural flow of rain water is a rill. Many rills come together to form a gully. Many gullies come together and form a stream. Many streams come together and form a river. Thus we can see that rills, gullies, streams nad rivers are the various forms of flowing water in increasing order of their size.
Question 2.
What is a river?
Answer:
Running water flows naturally in a direction according to gravity along the slope, making its own way. This is called a flow of water when many such flows of water come together a river is formed.
Question 3.
Where can you see the work by glaciers in India?
Answer:
Glaciers can be seen in the Himalayan region in India.
Question 4.
In which natural region can you see the work of glaciers at the sea level?
Answer:
We can see the work of glacier at sea level in the Polar regions (Antarctica).
Question 5.
Where will you find the landforms formed by sea waves along the Konkan coast?
Answer:
Along the Konkan coast, landforms formed by sea waves can be found at Harihareshwar, Bhagwatibandar, Shrivardhan, Ratnagiri and Sindhudurg.
Think about it.
Question 1.
There are many creeks found in the coastal areas of Konkan but no delta, why?
Answer:
The Konkan coast has an indented (broken) coastline. Hence many creeks are found here. Many small seasonal rivers originate in the steep western side of the Western Ghats. As the rivers flow through the steep slopes their velocity increases. So, there is very little erosion done by them. Due to the narrow width of the Konkan coast, the rivers cover a short distance and drain in the Arabian sea. Thus they do not form estuaries rather than deltas.
Question 2.
Can you see a glacier moving just as you can observe the movement of river water?
Answer:
No
Question 3.
Ramu has to dig a well in his farm. But he is in a dilemma as to which season should he dig it so that there is water supply for a longer time. What will you suggest to Ramu?
Answer:
Ramu should dig a well during the summer season. A deep well can be dug during the summer season. This will ensure water supply not only during the monsoon and winter season but also during the next summer season.
Question 4.
Which agent has more kinetic energy of all-wind, river or glacier?
Answer:
Glacier is the agent of erosion which has the most kinetic energy of all. The glacier is a mixture of heavy soil and rock particles which are flowing. Thus it has both weight and movement.
Find out.
Question 1.
Is there any lake found near the meanders of the river? Obtain information about them.
Answer:
Question 2.
Where will you find mushroom rocks in the Deccan Plateau?
Answer:
Mushroom rocks can be found in the Hyderabad.
Question 3.
Can you find the work of wind near coastal areas? What landforms will be formed there?
Answer:
Yes, Ripple marks and sand mounds can be seen on the sand in the coastal regions.
Question 4.
Where are limestone caves, stalactites and stalagmites found in Maharashtra?
Answer:
Limestone caves, stalactites and stalagmites are found in Kanhur caves in the Ahmednagar district of Maharashtra.
Question 5.
Why are the landforms formed in limestone called Karst?
Answer:
A karst is an area of land formation created by eroding and dissolving portions of limestone or other soluble rock layers above or below the ground. According to the prevalent interpretation, the term is derived from the German name for the Karst region, a limestone plateau above the city of Trieste in the northern Adriatic.
Class 9 Geography Chapter 4 Exogenetic Movements Part 2 Additional Important Questions and Answers
Complete the statements by choosing the correct options.
Question 1.
The sediments are deposited at the foothills of the mountains in a triangular area forming an/a ………….. .
(a) alluvial fan
(b) yardang
(c) delta
(d) V-shaped valley
Answer:
(a) alluvial fan
Question 2.
The sediments carried by the glacier2 are called ………….. .
(a) sediments
(b) silt
(c) moraines
(d) alluvium
Answer:
(c) moraines
Question 3.
The erosional, transportation and depositional work of wind is more prominent in ………….. .
(a) polar regions
(b) deserts
(c) temperate regions
(d) grasslands
Answer:
(b) deserts
Question 4.
When many flows of water come together a …………… is formed.
(a) gorge
(b) river
(c) glacier
(d) canyon
Answer:
(b) river
Question 5.
The water which percolates through the porous rocks on the non-porous layer of rock is termed as ………….. .
(a) glacier
(b) flood leeves
(c) ground water
(d) surface water
Answer:
(c) ground water
Question 6.
…………… is formed due to depositional work of river.
(a) Delta
(b) Gorge
(c) V-shaped valley
(d) Canyon
Answer:
(a) Delta
Question 7.
In regions, where the temperatures are generally below freezing points, precipitation is in the form of ………….. .
(a) rainfall
(b) hail
(c) snowfall
(d) frost
Answer:
(c) snowfall
Question 8.
The erosional work of glacier forms ………….. .
(a) drumlins
(b) eskers
(c) cirques
(d) yardangs
Answer:
(c) cirques
Question 9.
The Jacobshavn Glacier in …………… is one of the fastest moving glaciers in the world.
(a) Finland
(b) Greenland
(c) Antarctica
(d) Himalayas
Answer:
(b) Greenland
Question 10.
The depositional work of ground water forms ………….. .
(a) limestone caves
(b) lagoons
(c) ripple marks
(d) seifs
Answer:
(a) limestone caves
Question 11.
Stalactites grow ………….. .
(a) downwards
(b) upwards
(c) sidewards
(d) fast
Answer:
(a) downwards
Question 12.
The ground water levels sink down in …………… season.
(a) summer
(b) winter
(c) rainy
(d) spring
Answer:
(a) summer
Question 13.
…………… is formed as a result of the depositional work of the sea waves.
(a) Sea cliff
(b) Lagoon
(c) Wave-cut platform
(d) Sea cave
Answer:
(b) Lagoon
Question 14.
The landforms developed in limestone areas are also called as …………… landforms.
(a) lime
(b) sinkhole
(c) krast
(d) coastal
Answer:
(c) krast
Match the Columns:
(1) River
| Column A’ | Column B’ | ||
| (1) | Erosion | (a) | Ox-bow lake |
| (2) | Deposition | (b) | Meanders |
| (c) | Yardangs | ||
Answer:
(1 – b),
(2-a)
(2) Glacier
| Column ‘A’ | Column ‘B’ | ||
| (1) | Erosion | (a) | Seif |
| (2) | Deposition | (b) | Eskers |
| (c) | Cirque | ||
Answer:
(1 – c),
(2 – b)
(3) Wind
| Column ‘A’ | Column B’ | ||
| (1) | Erosion | (a) | Sand dunes |
| (2) | Deposition | (b) | Mushroom Rock |
| (c) | Lagoon | ||
Answer:
(1 – b),
(2 – a)
(4)
| Column ‘A’ | Column B’ | ||
| (1) | Ground water | (a) | Delta region |
| (2) | Sea waves | (b) | Lagoon |
| (c) | Sink holes | ||
Answer:
(1 – c),
(2 – b)
(5)
| Column ‘A’ | Column B’ | ||
| (1) | Stalactites & stalagmites | (a) | wind |
| (2) | Sand bar | (b) | ground water |
| (c) | sea waves | ||
Answer:
(1 – b),
(2 – c)
Answer in one sentence:
Question 1.
Name the agents of erosion.
Answer:
The agents of erosion are wind, rivers, glaciers, sea waves and ground water.
Question 2.
What factors does the work of a river depend on?
Answer:
The works of river depends on the nature of rock, the slope of land, velocity of the flow and the volume of water.
Question 3.
What are the important phases of a river’s work?
Answer:
The important phases of a river’s work are erosion, transportation and deposition.
Question 4.
What factors does the work of glaciers depend on?
Answer:
The work of glacier depends on the thickness of the accumulated ice, the temperature, and the slope of the land.
Question 5.
Which landforms are created due to the processes of erosion by the river?
Answer:
Landforms like gorges, V-shaped valleys, potholes and waterfalls are created due to the processes of erosion by the river.
Question 6.
Which landforms are formed mainly due to the transportational and depositional work of a river?
Answer:
Due to the transportational and depositional work of a river, meanders, ox-bow lakes, flood levees, flood plains and delta regions are formed.
Question 7.
Which landforms are created as a result of the erosional work of a glacier?
Answer:
The landforms such as a cirque, arete and matterhorn, U-shaped valley, hanging valleys, etc. are created as a result of the erosional work of a glacier.
Question 8.
Name the landforms formed by the depositional work of glaciers.
Answer:
The landforms formed by the depositional work of glaciers are drumlins, eskers etc.
Question 9.
Name the types of moraine.
Answer:
Ground moraine, lateral moraine, medial moraine and terminal moraine are the different types of moraine.
Question 10.
Which landforms are created as a result of the erosional work of the wind?
Answer:
The landforms like mushroom rocks, deflation hollows, yardangs etc. are created as a result of the erosional work of the wind.
Question 11.
Which landforms are created as a result of the transportation and depositional work of the wind?
Answer:
Sand dunes, barchans, seif, ripple marks, and loess plains are created as a result of transportation and depositional work of the wind.
Question 12.
Which landforms are produced as a result of the erosional work of sea waves?
Answer:
The landforms like sea cliffs, sea caves, wave-cut platforms, sea arches and sea stacks are produced as a result of the erosional work of sea waves.
Question 13.
Mention the landforms created due to the transportation and depositional work of sea waves.
Answer:
Beaches, sand bars and lagoons are created due to the transportation and depositional work of sea waves.
Fill the map with the given information and make a legend.
(1) Konkan Coast where work of sea waves can be seen
(2) Region in India where work of glaciers can be seen
(3) Desert region in India where work of wind can be seen
Answer:
Give geographical reasons:
Question 1.
Like the river, a glacier too carries out the work of erosion, transportation and deposition.
Answer:
Question 2.
Specific landforms are formed due to deposition by wind in arid and semi arid regions.
Answer:
Question 3.
The work of sea waves cause different landforms.
Answer:
Question 4.
In the desert, the work of wind is effective.
Answer:
Question 5.
Glaciers have a low velocity.
Answer:
Question 6.
The ground water level changes according to seasons.
Answer:
Identify the land forms made by waves and write their names in the given picture.
Answer:
Write the name of the landforms with which the following diagrams are associated. Colour the eroded and the remaining part, if any, in the given diagrams.
Answer:
(a) Mushroom Rock
(b) Sand Dune (Barchan)
(c) Yardangs
(d) Seif (Sand Mounds)
Identify the landforms formed by groundwater in the given diagram.
Answer:
Stalactite and Stalagmite cave.
Answer the following questions in brief:
Question 1.
List the agents responsible for new landforms. i
Answer:
The agents – running water (river), glaciers, wind, sea waves and groundwater, – do the work of erosion, transportation and deposition. Because of these agents, the earth’s surface keeps undergoing changes and new landforms are formed.
(i) Running water (river):
(ii) Glaciers:
(iii) Wind:
(iv) Sea waves:
(v) Groundwater:
Question 2.
List the landforms that are produced due to deposition of sediments by rivers.
Answer:
Landforms like flood levees, flood plains, deltas are formed because of deposition of sediments,
Question 3.
Write in detail about the erosional and depositional work of wind.
Answer:
(i) Erosional work of winds:
(ii) Depositional work of winds:
Question 4.
Write in detail about the erosional and depositional work of sea waves.
Answer:
(i) Erosional work of sea waves:
(ii) Depositional work of sea waves:
Explain:
Question 1.
Erosional work of rivers
Answer:
Question 2.
Transportation and deposition by rivers
Answer:
Question 3.
Erosion work by glaciers
Answer:
Question 4.
Transportation and deposition by glaciers
Answer:
Question 5.
Erosional and depositional work of wind
Answer:
Question 6.
Erosional work of sea waves
Answer:
Question 7.
Depositional work of sea waves
Answer:
Question 8.
Work of groundwater and landforms
Answer:
Question 9.
Groundwater table
Answer: