WBBSE Solutions For Class 10 Geography And Environment Chapter 7 Satellite Imageries And Topographical Maps

Chapter 7 Satellite Imageries And Topographical Maps Short Explanatory Answer Type Questions

Question 1. Write a shote note on the sensors of a satellite.
Answer:

The sensors of a satellite

An active sensor is a sensing device that provides its own energy source for illumination. lt emits radiation directed towards the target and detects and measures radiation reflected from the target. Thus, active sensors help satellites to capture images at night.

A passive sensor is a sensing device that simply detects and responds to some type of input from the physical environment. In other words, a passive sensor can only be used to detect energy when emitted and reflected from the ground surface. Thus, passive sensors work when the sun is illuminating the earth.

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Question 2. What are the disadvantages of satellite images?
Answer:

The disadvantages of satellite images are—

1. Data collection becomes difficult if the sky is cloudy.
2. The exact height of any region or object cannot be calculated.
3. The development of satellite images incurs high costs due to the use of highly advanced technology.

Question 3. Write some characteristics of topographical maps.
Answer:

The characteristics of topographical maps are—

1. Topographical maps represent the physical and cultural features of a region together. Hence, analysis of the region becomes easier.
2. In the case of rivers, the direction of flow, nature of the river, and other details are provided. This helps to detect the direction of the slope of the land.
3. The absolute height, relative height, or the type of terrain of the region can be clearly understood from a toposheet.
4. Information about Economic activities practiced in the region can be easily analyzed

Question 4. What do you by ‘ an inch to a mile’ toposheet?
Answer:

Inch to a mile’ toposheet:

The 1° x 1° toposheet can be further subdivided into 16 toposheets (15′ %15’j. These are numbered from 1 to 16. These are known as ‘inch sheets or inch maps’. The scale of these maps is 1 cm to 0.5 km or 2 cm to 1 km.

Example— Topographical map no. 72 A/12.

WBBSE Class 10 Geography Chapter 7 Question Answer

Question 5. What is the various extra information that we get from the topographical maps apart from the ones regarding the physical and cultural features?
Answer:

The topographical maps provide us with several extra information—

1. Map number of the region surveyed.
2. The latitudinal and longitudinal extent of the region.
3. State, district of the region surveyed.
4. Year of the survey.
5. Statement scale, R.F. as well as the linear scale of the map.
6. Contour interval.
7. List of conventional symbols used on the map.
8. Names of the Surveyor General, the person conducting the survey and preparing the map.

Question 6. What are the different scales used in topographical maps? Or, Give an account of different types of scales in tabular form as used in “topographical maps”.
Answer:

The different scales used in topographical maps are—

 

Name of the sheet	R.F.	Statement Scale	Latitudinal and longitudinal extent	Map No. (Example)
Million Sheet	1:1,000,000	1 inch to 16 miles	4°x4°	73
Degree Sheet	1: 250,000	1 inch to 4 miles	1° x 1°	73 M
Half-degree sheet	1: 100,000	1 inch to 2 miles	30’x 30′	73 M/NE
Inch Sheet	1: 50,000	1 inch to 1 mile	15′ x 15′	73 M/5
Special maps	1: 25,000	4 cm to 10 km	5′ x 7’30”	73 M/5/2 (according to Old Layout before 1990) 73M/5/NE (according to New Layout since 1990)

 

Question 7. Give examples of topographical maps having an extension of 4° *4°, 1° x 1° and 15′ x 15′ toposheets.
Answer:

The examples are as follows—1. 4° x 4° topographical maps— 54, 55, 56, 57, etc.
2.1° x 1° topographical maps— 54B, 55P, 56D, 57A, etc. 3. 15′ x 15′ topographical maps— 54B/5, 55P/12, 56D/10, 57A/4, etc.

Question 8. What do you mean by the LANDSAT series satellites?
Answer:

LANDSAT series satellites

NASA took an initiative to develop and launch the first earth monitoring satellite to meet the needs of earth scientists. ERTS-A (Earth Resource Technology Satellites-A) was the first launched in a series of satellites in space to provide global coverage of the earth’s surface.

Later, the name of the series was changed to LANDSAT. The LANDSAT data is used for commercial, industrial, military, educational, etc, purposes both in the USA and the world over.

Question 9. Name some satellites launched by India.
Answer:

Some satellites launched by India are—

1. Aryabhatta (India’s first satellite) —1975,
2. Bhaskara-I —1979,
3. Bhaskara-ll—1981,
4. INSAT series (, 1B2E, 3A, 3C, 3D, etc.)—1983 onwards.

Question 10. Why are topographical maps important in the study of geography?
Answer:

Topographical maps are an important part of the study of geography. The knowledge of geography remains incomplete without the knowledge and study of topographical maps.

The significance of toposheets is as follows—

Topographical maps provide information regarding terrain, landform, rivers, lakes, forests, roadways, railways, bridges, temples, mosques, churches, settlements, and many other features of a region. This helps in analyzing and understanding the relationship between different physical and cultural features.

Topographical maps are also important to the military for understanding the various aspects required for protection. They are also useful in forming strategies for political Administration. Thus, maps of regions under military surveillance are restricted and not available to the public.

WBBSE Class 10 Geography Chapter 7 Question Answer

Question 11. What are the indicators of plain land on a topographical map?
Answer:

The indicators of plain land on a topographical map

The main indicator of relief of any region represented on a topographical map is the contours. If the contours lie quite far from each other, and their values are not too high, the region represented is a plain land. There are other indicators also.

Example—The rivers will be wide, perennial, and meandering. Sandbars and oxbow lakes may be present along the course of the river

Question 12. How can a plateau be identified on a topographical map?
Answer:

If the contours on a topographical map run in a crooked manner and their values range from 400-600m, the region represents a plateau. Within this region, some concentric contours may represent domes or low hills. Rivers may also flow through the region.

Question 13. Discuss the characteristic features of geostationary satellites.
Answer:

The characteristic features of the geostationary satellites are as follows—

1. They lie at a height of approximately 36,000 km above the earth’s surface.
2. They revolve around the earth in 24 hours along the equatorial plane.
3. They move from west to east like the earth.
4. Being installed at such a height, they can take photographs of the full hemisphere at a time.
5. They can take numerous photographs of the same region at a time. This makes data analysis very easy.

Question 14. Discuss the characteristic features of the sun-synchronous satellites.
Answer:

The characteristic features of the sun-synchronous satellites are—

1. These satellites are installed at a height of 700-800 km above the earth’s surface.
2. They move around the earth from the north pole to the south polar regions in circular or elliptical orbits.
3. The satellites cover each area at a constant local time of the day.
4. The images developed from the information collected by these satellites are used for detecting natural and mineral resources,
5. surveying different regions, and preparing other kinds of maps with the acquired data like resource maps, forest maps, land use maps, etc. E.g.—The IRS series of satellites of India are sun-synchronous satellites.

WBBSE Class 10 Geography Chapter 7 Question Answer

Question 15. Discuss the use of colors to develop satellite images.
Answer:

Two types of colors are used in satellite images—

1. True Colours
2. False Colours

Use of true colors: If the satellite images represent the physical features of the earth in the exact colors as they appear in reality, they are said to be developed using true colors.

E.g.—Forests are represented in green, and rivers are represented in blue.

Use of false colors: If the satellite images represent the physical features of the earth with colors totally different from what they appear as in reality, they are said to be developed using false colors.

E.g.— The forests and natural vegetation are represented in red instead of green.

Question 16. Discuss the various steps leading to the development of satellite images.
Answer:

The satellite images are developed following several steps.

At first, the sensors present in the satellites record the electromagnetic waves reflected by the target object or region. The passive sensors record the electromagnetic waves during day time.

At night; the active sensors record the waves with the help of the reflection of light from radars. These reflections are converted to digital information.

This information is then scanned and analyzed by the satellites and sent to the receiving centers on earth.

The area or region scanned by the satellites is divided into several grids and the information collected by them is inserted accordingly; in order to develop usable images.

These satellite images are analyzed by advanced computers and then used for their specific purposes.

Question 17. Why are false colors used In satellite images?
Answer:

Satellite images are developed by using two types of colors—i.e., true colors and false colors. True color images represent the physical features of the earth as they appear originally.

False color images represent the physical features with colors that are totally different from the original colors of the features. False colors help to represent the features with higher accuracy. They are also useful in maintaining the secrecy of certain information, as such images are not easily understood by a layman.

Question 18. How does the slope of the relief change, if the distance between contours in a topographical map increases or decreases?
Answer:

The contours are imaginary lines drawn in topographical maps joining places that have the same altitude. In a topographical map, if the contours lie very close to each other, it indicates that the slope of the land is steep. If the contours lie far apart from each other, it indicates that the slope of the land is gentle.

WBBSE Class 10 Geography Chapter 7 Question Answer

Question 19. What are the main characteristics of satellite imagery? Or, Briefly discuss three main characteristic features of satellite imageries.

1. Remote Sensing System: The sensors present in the satellites help in gathering information about a region or an object from very long distances, without coming in physical contact. This is called remote sensing.

2. Correct information: Satellite imageries provide absolutely correct information about the region being photographed.

3. Time of collecting information: The images are developed depending on the information collected by the sensors installed in the satellites. Passive sensors collect information during the daytime, while active sensors help to collect information at night.

4. Fast imaging: Satellite images can be developed very fast in the process of remote sensing. Also, the total manpower required in the whole process is less.

5. Survey of rugged terrain: Satellite images help to study inaccessible and rugged terrain, which would otherwise be difficult to physically survey.

6. Weather forecast: The series of images of the atmosphere available continuously, help in understanding the current weather phenomena. This helps in analyzing and forecasting weather.

Question 20. What are the uses of satellite images?
Answer:

Satellite images are used for various purposes.

A few of them listed are as follows—

1. Knowledge about the land surface, land use, and land cover:
2. The types of land surfaces can be identified and classified.
3. Land use and land cover maps can be prepared.
4. Changes in land use patterns can be identified from images over time

Question 21. What are the differences between topographical maps and satellite images?
Answer:

The difference between satellite images and topographical maps are followed-

WBBSE Class 10 Geography Chapter 7 Question Answer

Point of difference	Topographical maps	Satellite images
Concept	They are maps representing the physical. They are images that are developed	They are images and cultural features of a region based on remote sensing through field surveys of the region satellites.
Colors/Symbols used	The physical and cultural features are represented by conventional symbols and specific colors.	The physical and cultural features are photographed and represented by true or false colors.
Time of data collection	Generally, surveys are conducted during the day.	Data can be collected at any time of the day or night.
Scale	The scale of features represented on topographical maps is not always accurate. E.g.—Rivers and roadways are difficult to be represented | accurately.	The satellites use highly advanced sensors. Hence the scale of the images developed is accurate.
Analysis of images	Analysis of topographical maps is comparatively easier. It can be easily interpreted. if one has knowledge of conventional symbols.	The features represented in satellite images are difficult to be analyzed. Hence experts are required.
Publisher	In India, topographical maps are published by the Survey of India, Dehradun.	In India, satellite images are published by the National Remote Sensing Centre, Hyderabad.

Chapter 7 Satellite Imageries And Topographical Maps Short Answer Type Questions

 

Question 1. What are the uses of satellite images?
Answer:

The uses of satellite images

Satellite images are photographs of the earth and other planets captured by imaging satellites installed in space.

Question 2. What are artificial satellites?
Answer:

Artificial satellites

Artificial satellites are highly advanced objects orbiting the earth and other planets in space transmitting signals which are turned into relevant information by man. They are used for various purposes, like military operations, weather forecasting, mapping various regions, gathering information about different aspects of the earth, etc.

Question 3. What is remote sensing?
Answer:

Remote sensing

Remote sensing is the method of gathering information about any region or object on the earth’s surface or the surface of other planets from a considerable distance, without coming in physical contact. This information helps in analyzing the region or the object.

Question 4. What do you mean by electromagnetic radiation?
Answer:

Electromagnetic radiation

Electromagnetic radiation refers to waves of the electromagnetic field carrying electromagnetic radiant energy propagating through space. It includes visible light, radio waves, gamma rays and X-rays, ultraviolet rays, etc. These waves do not need any solid or liquid medium for propagation.

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Question 5. What do you mean by ‘nadir’?
Answer:

‘Nadir’:

‘Nadir7 is the point on the earth’s surface vertically beneath the satellite. It lies diametrically opposite to the zenith.

 

Question 6. Mention two importance of satellite imagery.
Answer:

Two important satellite images are—

1. Satellite images help in detecting physical features, and natural and man-made resources of an area.
2. Satellite images help in weather forecasting.

Question 7. What do you mean by the IRS series of satellites?
Answer:

IRS series of satellites

IRS refers to ‘Indian Remote Sensing’. This organization manufactures and launches satellites into space under the name IRS series for the purpose of remote sensing. The first such satellite was launched by India in 1988.

Question 8. What are geostationary satellites?
Answer:

Geostationary satellites

The artificial satellites that orbit the earth from west to east in circular orbits at the same time as that of the earth’s one rotation (24 hours), are called geostationary satellites. They are found at a height of approximately 36,000 km above the equator. Eg.—GOES- E, GOES-W

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Question 9. What are sun-synchronous satellites?
Answer:

Sun-synchronous satellites

The sun-synchronous satellites are those which are installed on a geocentric orbit that combines altitude and inclination in such a way, that the satellite passes over any given point of the planet’s surface at the same local solar time.

These satellites are installed 700-800 km above the land surface and orbit the earth in circular or elliptical paths from the north pole to the south polar regions. These are mainly used for the detection of mineral resources on the earth. Example-IRS, LANDSAT, etc.

 

 

Question 10. How can the best quality satellite images be obtained?
Answer:

The best quality satellite images can be obtained during day time when the sky is clear and there is sufficient sunlight.

Question 11. What are topographical maps?
Answer:

Topographical maps

The maps that represent the physical and cultural features of a region together on the same map drawn to a scale with the help of conventional symbols, are called topographical maps.

Question 12. Who prepares the topographical maps in India?
Answer:

The topographical maps are prepared in India by the ‘Survey of India’. This organization was established in 1767. Its headquarters is situated at Dehradun, Uttarakhand.

Question 13. What are contour lines?
Answer:

Contour lines

The imaginary lines drawn on topographical maps joining places having the same altitude above mean sea level, are called contour lines. They are represented as brown lines on topographical maps.

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Question 14. In how many ways can the altitude of any place be represented?
Answer:

The altitude of any place can be represented in three ways—

1. Height above the mean sea level,
2. Absolute altitude,
3. Relative relief.

Question 15. What do you mean by relative relief?
Answer:

Relative relief:

The difference in height or altitude of a place and the altitude of the highest point of that region is known as relative relief.

Question 16. What do you understand when the R.F. of a map is 1:50,000?
Answer:

R.F. of a map is 1:50,000

R.F. (Representative Fraction) 1:50,000 means that 1 cm on the map represents 50,000 cm or 0.5 km distance on the ground.

Question 17. What does the green color used on toposheets indicate?
Answer:

The flat green color used on the toposheets indicates forest cover. Also, some symbols drawn with green represent different kinds of natural vegetation.

 

 

Question 18. What are degree sheet topographical maps?
Answer:

Degree sheet topographical maps

The topographical maps are constructed on a scale of 1 inch to 4 miles, or have an R. F.
1:250,000 are called degree sheet topographical maps. They have a latitudinal and longitudinal extent of 1° x 1°.

Question 19. What are inch-sheet topographical maps?
Answer:

Inch-sheet topographical maps

The topographical maps that are constructed on a scale of 1 inch to 1 mile or have an R.F. 1:50,000, are called inch sheet topographical maps. The latitudinal and longitudinal extent of such maps is 15’x 15′.

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Question 20. How are conical hills represented on topographical maps?
Answer:

If the contour lines of a region lie in concentric circles and the distance between adjacent contours is more or less uniform, the feature represented is a conical hill.

 

 

Question 21. How can ‘badland’ be identified on a topographical map?
Answer:

Badland is represented on a topographical map by broken black lines along the nonperennial rivers in dry or arid regions. The badlands are formed mostly due to gully erosion in dry or arid regions due to a lack of vegetation, and rough soil.

Question 22. What is spot height?
Answer:

Spot height:

The exact height of any place above mean sea level(MSL) represented by a dot and the height mentioned in figures beside it on a toposheet, is known as spot height. The figures mentioned in the spot heights may be written in ‘feet’ or ‘meters’, depending on the type of scale of the map.

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Question 23. What do you mean by the platform of a satellite?
Answer:

Platform of a satellite:

The place where the artificial satellite is installed in space to move in its own circular or elliptical orbit is called the platform of the satellite.

Question 24. What is an active sensor?
Answer:

Active sensor

An active sensor is a sensing device that provides its own energy source for illumination. lt emits radiation directed towards the target and detects and measures radiation reflected from the target. Thus, active sensors help satellites to capture images at night.

Question 25. What is a passive sensor?
Answer:

Passive sensor

A passive sensor is a sensing device that simply detects and responds to some type of input from the physical environment. In other words, a passive sensor can only be used to detect energy when emitted and reflected from the ground surface. Thus, passive sensors work when the sun is illuminating the earth.

Question 26. What do you mean by FCC?
Answer:

FCC:

FCC means ‘False Colour Composite’. In the case of satellite images, a different set of color schemes other than their original color is used to portray the physical features (rivers, vegetation, forests, relief, etc.) and the artificial features (roads, settlements, etc.) of the earth’s surface. The color scheme used has an international standardization. E.g. vegetation is shown in red color.

Question 27. What do you mean by escape velocity?
Answer:

Escape velocity:

The escape velocity is the minimum velocity required by an object to escape the gravitational attraction of a planet or any other body. The unit for escape velocity is meters per second (m/s). The escape velocity of the earth is 11.2km/s.

Class 10 Geography West Bengal Board

Question 28. Define topographical Map.
Answer:

Topographical Map:

The maps that represent the physical and cultural features of a region together on the same map drawn to a scale with the help of conventional symbols, are called topographical maps. This type of map is prepared on the basis of primary data obtained by surveying a particular area. The topographical maps are prepared in India by the ‘Survey of India’. This organization was established in 1767. Its headquarters is situated at Dehradun, Uttarakhand.

Class 10 Geography Chapter 7 Question Answer WBBSE

Chapter 7 Satellite Imageries And Topographical Maps Multiple Choice Type Questions Mcq type

 

Write The Correct Answer From The Given Alternatives

Question 1. The word ‘Satellite’ means- in French—

1. Celestial body moving around planets
2. Guard
3. Observation
4. Gatekeeper

Answer: 2. Guard

Question 2. Which one is a natural satellite?

1. Pluto
2. Earth
3. Jupiter
4. Moon

Answer: 4. Moon

Question 3. The first artificial satellite of the Earth was—

1. INSAT-1
2. Landsat-1
3. Sputnik 1
4. Aryabhatta

Answer: 3. Sputnik 1

Question 4. The first artificial satellite launched by India was—

1. INSAT-1
2. Landsat-1
3. Sputnik 1
4. Aryabhatta

Answer: 4. Aryabhatta

Question 5. The first astronaut from India, who visited space was—

1. Yuri Gagarin
2. Valentina Tereskova
3. Rakesh Sharma
4. Sunita Williams

Answer: 3. RakeshSharma

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 6. The first satellite images of the earth were developed in the year—

1. 1959
2. 1965
3. 1970
4. 1947

Answer: 1. 1959

Question 7. The first artificial satellite launched by NASA was—

1. IRA-IA
2. LISS-II
3. NOAA
4. TIROS-1

Answer: 4. TIROS-1

Question 8. The geostationary satellites are installed km above the land surface—

1. 600 km
2. 6000 km
3. 12,000 km
4. 36,000 km

Answer: 4. 36,000 km

Question 9. The place where an artificial satellite is installed in space is called the—

1. Spot
2. Sensor
3. Platform
4. Lansmat

Answer: 3. Platform

Question 10. is a geostationary satellite launched by India—

1. METEOSAT
2. GOMS
3. INSAT
4. GMS

Answer: 3. INSAT

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 11. The sun-synchronous satellites are installed at a height of km from the earth’s surface—

1. 500-700 km
2. 600-800 km
3. Above 40,000 km
4. Above 36,000 km

Answer: 2. 600-800 km

Question 12. The sun-synchronous satellites move from—

1. East to West
2. West to East
3. North to South
4. South to North

Answer: 3. North to South

Question 13. In a satellite image, the vegetation appears to be—

1. Red
2. Blue
3. Green
4. Yellow

Answer: 1. Red

Question 14. The topographical maps are constructed based on the—

1. Mathematical calculations
2. Survey
3. Photographs
4. None of these

Answer: 2. Survey

Question 15. The Survey of India was established in—

1. 1567 A.D.
2. 1767 A.D.
3. 1667 A.D.
4. 1867 A.D.

Answer: 2. 1767 A.D.

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 16. The SPOT-1 satellite was launched in the year—

1. 1978
2. 1986
3. 1990
4. 1996

Answer: 2. 1986

Question 17. The main work of the SPOT satellite is—

1. To help in international trade
2. To forecast weather
3. To help in agriculture
4. To help in industrial development

Answer: 1. To help in international trade

Question 18. The internationally accepted scale for topographical maps is—

1. 1:1,000,000
2. 1:200,000
3. 1:100,000
4. 1:50,000

Answer: 1. 1:1,000,000

Question 19. The topographical maps covering the South Asian region are drawn on a scale of—

1. 1:1,000,000
2. 1:200,000
3. 1:100,000
4. 1:10,000

Answer: 2. 1:200,000

Question 20. The topographical maps covering India and its neighboring countries are drawn on a scale of—

1. 1:1,000,000
2. 1:200,000
3. 1:100,000
4. 1:50,000

Answer: 1.1:1,000,000

Question 21. The LANDSAT-1 satellite collects data of India—

1. Forests
2. Soil erosion
3. Military routes
4. Radars of enemy countries

Answer: 4. Radars of enemy countries

Question 22. The topographical maps with an R.F. of 1:50,000 cover a latitudinal and longitudinal extent of—

1. 4°x4°
2. 1° x 1°
3. 30’x 30′
4. 15’x 15′

Answer: 4. 15’x 15′

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 23. The metric scale in ‘million sheets’ topographical maps is—

1. 1 cm to 10 km
2. 1 cm to 2.5 km
3. 1 cm to 1 km
4. 1 cm to 500 km

Answer: 1. 1 cm to 10 km

Question 24. The geostationary satellite launched by Japan is—

1. INSAT
2. NOAA
3. GMS
4. LANDSAT

Answer: 3. GMS

Question 25. The infrared rays are used for acquiring—

1. Aerial photographs
2. Topographical maps
3. Satellite imageries
4. Different scalesAnswer: 3. Satellite imageries

Question 26. maps show physical and cultural features on the same map—

1. Mouza
2. Topographical
3. Weather
4. Political

Answer: 2. Topographical

Question 27. The different features on the topographical maps are represented with the help of—

1. Graphs
2. Different colors
3. Conventional symbols
4. Scale

Answer: 3. Conventional symbols

Question 28. On topographical maps, height is represented with the help of—

1. Contour lines
2. Isobars
3. Isohytes
4. Isotherms

Answer: 1. Contour lines

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 29. Satellite imagery is—

1. Photograph of the satellite
2. Photograph of the earth’s surface
3. Photograph of the space
4. Imagery developed with the help of information collected by the satellite

Answer: 4. Imagery developed with the help of information collected by the satellite

Question 30. The sensor used in developing satellite imagery is—

1. MISS
2. USS
3. D1SS
4. TISS

Answer: USS

Question 31. The electromagnetic energy used by sensors which are then processed and developed into a satellite image comes from the—

1. Moon
2. Earth
3. Sun
4. None of these

Answer: 3. Sun

Question 32. The topographical maps are prepared in India by the—

1. Geological Survey of India (GSI)
2. Survey of India (SOI)
3. Anthropological Survey of India (ASI)
4. General Sample Survey (GSS)

Answer: 2. Survey of India (SOI)

Question 33. The satellite sent by India is –

1. IRS
2. LANDSAT
3. SPOT
4. Station

Answer: 1. IRS

Chapter 7 Satellite Imageries And Topographical Maps If the statement is true, write True, and if false write false against the following

 

Question 1. Sensors are very important in remote sensing.
Answer: True

Question 2. Photographs taken by artificial satellites are called satellite images.
Answer: True

Question 3. The geostationary satellites move from the west to the east in the same direction as the earth’s rotation.
Answer: True

Question 4. The ultraviolet rays of the electromagnetic spectrum are used in remote sensing.
Answer: False

Question 5. Radio waves are the longest waves of the electromagnetic spectrum.
Answer: True

Question 6. Topographical maps are more accurate than satellite imagery.
Answer: False

Question 7. A map with R.F. 1:25,000 can be constructed to represent an area of 89 sq. km.
Answer: True

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 8. The satellite images in India are developed by the National Remote Sensing Centre, Hyderabad.
Answer: True

Question 9. The LANDSAT satellite gives information on the density of the ozone layer.
Answer: False

Question 10. Radars are used to take photographs only at night.
Answer: False

Question 11. Near-infrared rays are used to sense areas of natural vegetation.
Answer: True

Question 12. Generally, satellites capture and transmit signals after every 10 days.
Answer: False

Question 13. 52 y is a topographical map of the plateau region of India.
Answer: False

Question 14. Contour lines in topographical maps are drawn in brown color.
Answer: True

Question 15. 1:25,000 is a small-scale map.
Answer: False

Question 16. The larger the scale, the smaller the area of the region represented on the map.
Answer: True

Question 17. The contours in topographical maps never intersect each other.
Answer: True

Question 18. Radar is a sensor.
Answer: True

Question 19. Satellite imagery is the best method of remote sensing.
Answer: True

Question 20. ‘Platform’ is the place in space where the satellites are installed.
Answer: True

Chapter 7 Satellite Imageries And Topographical Maps Fill In The Blanks With Suitable Words

Question 1. INSAT-l is an _______
Answer: Artificial satellite

Question 2. Advanced_______ cameras are used in clicking satellite images.
Answer: High resolution

Question 3. Information acquired about an object from _______ a great distance without actually coming in contact with the object is called _______
Answer: Remote sensing

Question 4. The geostationary satellites of India are of _______ the series.
Answer: INSAT

Question 5. The total number of topographical maps drawn in the international series for both the northern and southern hemispheres of the earth is _______
Answer: 2222

Question 6. The three types of scales used in the construction of maps are statement scale, R.F and _______
Answer: Linear scale

Question 7. A _______ helps to collect secretive information such as photographs of missiles, military movements of enemies, etc.
Answer: Spy camera

Question 8. The reflected electromagnetic waves are received by the ______ of satellites.
Answer: Sensors

Question 9. The smallest unit of an image is called a_______
Answer: Pixel

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 10. The OCEANSAT satellite capture images after every _______ hour.
Answer: 48 hours

Question 11. The LANDSAT satellite captured images of the same region after every _______ day.
Answer: 18 days

Question 12. The father of remote sensing in India is _______
Answer: P. R. Pisharoty

Question 13. The unit used to measure the length of waves in a spectrum is_______
Answer: Micrometer

Question 14. The_______ and _______rays are not used in remote sensing.
Answer: Gamma, X

Question 15. The_______ rays are used in remote sensing.
Answer: Infrared

Question 16. The ultraviolet rays are absorbed by the _______layer of the atmosphere, hence, they are not used in remote sensing.
Answer: Ozone 17.1988

Question 17. The IRS satellites were first launched in India in _______
Answer: 1988

Question 18. The use of _______ is maximum in remote sensing.
Answer: Artificial satellites

Question 19. The Indian Space Research Organisation is situated in_______
Answer: Bengaluru

Question 20. The topographical maps are a type of _______ maps.
Answer: Large-scale one

Chapter 7 Satellite Imageries And Topographical Maps Answer in one or two words

Question 1. What are the basic steps of remote sensing?
Answer: Collection of data, image analysis, and interpretation.

Question 2. What are the two methods of remote sensing?
Answer: Aerial photography and satellite imagery.

Question 3. When was the term ‘remote sensing’ first used?
Answer: 1960.

Question 4. Name the source of energy used in capturing satellite images.
Answer: Sun.

Question 5. What is the R.F. of topographical maps of the international series?
Answer: 1:1,000,000.

Question 6. How many grids of topographical maps are there in India?
Answer: 135.

Question 7. What is the scale of million sheets of Indian topographical maps?
Answer: 1:1,000,000.

Question 8. What is the scale of the degree sheets of Indian topographical maps?
Answer:1:250,000.

Question 9. What are the topographic maps with a scale of 1:100,000 called?
Answer: Quadrant sheets.

Question 10. Where is the headquarters of the Survey of India located?
Answer: Dehradun.

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 11. Where is the branch of Survey of India located in West Bengal?
Answer: Kolkata.

Question 12. What is the contour interval in topographical maps?
Answer: 20 thin m (although some maps may have a contour interval of 10m).

Question 13. What is the scale of inch sheets of Indian topographical maps?
Answer: 1:50,000.

Question 14. What are the latitudinal and longitudinal topographical maps?
Answer: the extent of million sheets of Indian

Question 15. What is the latitudinal and longitudinal extent of degree sheets of Indian topographical maps?
Answer: l°xl°.

Question 16. What is the metric scale of degree sheets of topographical maps?
Answer:1cm to 2.5 km.

Question 17.What kind of topographical map is map no. 73A?
Answer: Degree sheet.

Question 18. What is the escape velocity needed to launch a satellite in space?
Answer: About 11.2 km/second.

Question 19. What is the escape velocity on the surface of the moon?
Answer: About 2.31 km/second.

Question 20. What is the escape velocity on the surface of the sun?
Answer: 617.6 km/second.

Question 21. What are satellites that orbit the earth from west to east and are stationed directly over the equator called?
Answer: Geo-stationary satellites.

Question 22. What is a temporary orbit used during the launch of a satellite called?
Answer: Parking orbit.

Question 23. Which satellites are deployed for military applications?
Answer: Reconnaissance satellites.

Question 24. Name one of the largest domestic communication satellite systems in India?
Answer: INSAT system.

Question 25. What is the LANDS AT series presently known as?
Answer: NOAA.

Question 26. When was the SPOT-1 satellite launched?
Answer: 1986.

Class 10 Geography Chapter 7 Question Answer WBBSE

Question 27. From where was the SPOT-1 launched?
Answer: French Guiana.

Question 28. What makes the sky appear blue?
Answer: Rayleigh scattering.

Question 29. Mention an important use of a satellite image.
Answer: The weather forecast.

Question 30. Mention a disadvantage of satellite images.
Answer: Cannot be understood by a layman.

Question 31. What are topographical maps also known as?
Answer: Toposheets.

Question 32. What are 1° x 1° toposheets called?
Answer: Degree sheets.

Question 33. Where is the scale of the map mentioned in a toposheet?
Answer: South of the map.

Question 34. What does the red color in a toposheet indicate?
Answer: Settlements and roads.

Question 35. How is natural vegetation represented on a toposheet?
Answer: In green color.

Question 36. What does NH indicate on a toposheet?
Answer: National Highway.

Question 37. What do PS and DB indicate on a toposheet?
Answer: Police station, Dak Bungalow.

Question 38. In which type of map, relief is shown by contour lines?
Answer: Topographical maps.

 

Chapter 7 Satellite Imageries And Topographical Maps Match The Following With The Right Column

1.

Left Column	Right Column
1.  Wavelength of gamma rays	A. 10_8m to 10’11m
2. Wavelength of infrared rays	B.  7x 10_7m to 4 x 10 7m
3. Wavelength of ultraviolet rays	C.  10-3m to 7 x 10_7m
4. Wavelength of visible light	D. 10_11m
5. Wavelength of infrared rays	E. 4 x 10″7 to 6 x 10_8m

Answer: 1-D,2-A,3-E,4-B,5-C

2.

Left Column	Right Column
1. Red double line on topographical maps	A. Hyderabad
2. GOES	B. Sensors
3. Remote Sensing Centre	C. Non-perennial rivers
4.LISS, PAN, OCM, etc.	D. Metalied road
5. Black lines on topographical maps	E. Artificial satellite

Answer: 1-D,2-E,3-A,4-B,5-C

WBBSE Solutions for Class 10 Geography and Environment

• Chapter 1 Exogenetic Processes and Resultant landforms
• Chapter 2 Atmosphere
• Chapter 3 Hydrosphere
• Chapter 4 Waste Management
• Chapter 5 India – Physical Environment
• Chapter 6 India – Economic Environment
• Chapter 7 Satellite Imageries and Topographical Maps