Chapter 6 – Satellite Imagery and Topographical Map | Class 10 School Geography Solution

Identify the correct answers

Question 1

The images of earth and other planets collected by satellites are called :

1. Maps
2. photographs
3. satellite images
4. none of these

Answer

(c) Satellite images

Explanation:

Satellite images are images of the Earth or other planets captured by satellites. These images are taken using cameras or sensors on board the satellites and can provide a wide range of information about the Earth’s surface, including details about land use, vegetation, weather patterns, and more.

Question 2

Satellites images are powerful tools of Meteorology as they :

1. forecast behaviour of atmosphere
2. identify shipping route
3. do land use mapping
4. identify physiographic features

Answer

(a) behavior of the atmosphere

Explanation:

Satellite images are powerful tools of Meteorology as they help to forecast the behavior of the atmosphere. By observing cloud patterns, temperature changes, and other weather-related phenomena, meteorologists can predict weather patterns and provide early warnings of severe weather events such as cyclones, storms, and hurricanes.

Question 3

The satellite that remains in a fixed location on the earth’s surface is called :

1. polar-orbiting satellite
2. geostationary satellite
3. Data collecting system
4. None of these

Answer

(b) Geostationary satellite

Explanation:

The satellite that remains in a fixed location on the earth’s surface is called a geostationary satellite.

Question 4

The satellite images that can be viewed during the day are :

1. infrared imagery
2. water vapour imagery
3. Analogue satellite images
4. visible imagery

Answer

(d) Visible imagery

Explanation:

Visible imagery can be viewed during the day as it captures the visible light spectrum that is reflected off the Earth’s surface.

Question 5

Topographical maps usually are :

1. small scale maps 
2. large scale maps
3. cadastral maps
4. weather maps

Answer

(b) Small scale maps

Explanation:

Topographical maps are usually Small scale maps.

Question 6

In order to describe surface features, topographical maps use :

1. scale 
2. north line 
3. conventional signs
4. none of these

Answer

(c) conventional signs

Explanation:

Topographical maps use conventional signs to describe surface features. These conventional signs are symbols used to represent different natural and man-made features on the surface of the earth, such as rivers, forests, buildings, roads, and contours

Question 7

The sensors in the satellites use to take images :

1. conventional camera
2. digital camera with CCD
3. a mobile phone
4. none of these

Answer

(b) digital camera with CCD

Explanation:

The sensors in the satellites use a digital camera with CCD (Charge-Coupled Device).

Question 8

The link between the earth and the sensor is the:

1. troposphere
2. stratosphere
3. electromagnetic wave
4. short waves

Answer

(c) electromagnetic wave

Explanation:

The link between the earth and the sensor is the electromagnetic wave.

If the sentence is true write T and if false write F against the following

Question

1. The polar-orbiting satellites orbit at 800-900 km elevation.
2. The topographical maps show large areas in greater detail. 
3. The scale of satellite Imagery is predetermined.
4. Topographical maps can be read in poor light conditions.
5. Relative relief is readily found in satellite images.
6. Satellite images can be prepared in short time. 

Answer

Fill in the blanks with ‘appropriate words’

Question

1. The scale of the satellite image is true only at the ____ point. 
2. Topographical maps do not show ____ information. 
3. The full form of R.F. is ____. 
4. ____ Linear Scale is just a line drawn on a map of known ground length. 
5. The space lying between the sensor and the earth is filled with ____ or is partly.
6. The full form of ERTS-1 is ____ ____ ____.

Answer

1. The scale of the satellite image is true only at the center point.
2. Topographical maps do not show aerial information.
3. The full form of R.F. is Representative Fraction.
4. Bar Linear Scale is just a line drawn on a map of known ground length.
5. The space lying between the sensor and the earth is filled with air or is partly vacuum.
6. The full form of ERTS-1 is Earth Resources Technology Satellite-1.

Answer in word or words

Question 1

In what form are the satellite images produced?

Answer

Satellite images are produced in digital form.

Question 2

What is the basic element of a satellite image?

Answer

The basic element of a satellite image is a pixel.

Question 3

Which element of satellite image means relative brightness? 

Answer

The element of a satellite image that means relative brightness is called radiance.

Question 4

What are used to generate satellite images? 

Answer

Satellite images are generated using sensors on board the satellite that capture electromagnetic radiation reflected or emitted from the Earth’s surface.

Question 5

Where is the scale found in a topographiçal map?

Answer

The scale is usually found in the map legend of a topographical map.

Question 6

What is the other name of the statement of scale?

Answer

The other name of the statement of scale is the scale bar.

Match the column A with column B

Answer

Short answer type questions :

Question 1

What is a satellite Image? 

Answer

A satellite image is a photograph of the Earth or other planets taken by a satellite in space. It provides a bird’s eye view of the land surface, water bodies, and other features on the planet.

Question 2

Why are satellite images powerful tools of meteorologists?

Answer

Satellite images are powerful tools of meteorologists because they can provide a large amount of information on the behavior of the atmosphere, such as cloud patterns, temperature changes, and wind direction.

Question 3

What are topographical maps?

Answer

Topographical maps are detailed and accurate maps that represent the natural and man-made features of a specific area on the Earth’s surface. These maps use contour lines and other symbols to represent elevation, relief, vegetation, water bodies, transportation networks, and other geographical features.

Question 4

What type of scale does a topographical map use?

Answer

A topographical map uses a representative fraction (RF) scale, which is a ratio of the distance on the map to the actual distance on the ground. For example, a map with an RF scale of 1:50,000 means that one unit of measurement on the map represents 50,000 units of measurement on the ground.

Question 5

What is a linear scale? 

Answer

A linear scale is a straight line drawn on a map that represents a known distance on the ground. It is used to measure the actual distance between any two points on a map.

Question 6

Write two uses of a satellite image.

Answer

The two uses of a satellite image are

1. Satellite images can be used for weather forecasting and monitoring of natural disasters.
2. They can also be used for land use mapping and environmental studies.

Answer the following questions :

Question 1

Write three points of difference between a topographical map and a satellite image.

Answer

Question 2

What does the water vapour imagery indicate? 

Answer

Water vapour imagery indicates the amount and movement of moisture in the atmosphere. It is useful in tracking the location and intensity of weather systems such as storms, hurricanes, and typhoons. It can also be used to identify areas of high or low pressure in the atmosphere.

Question 3

Write three main characteristics of a satellite image. 

Answer

The three main characteristics of a satellite image

1. Satellite images are digital representations of the Earth’s surface and atmosphere captured by satellites in orbit.
2. They are composed of pixels, which are tiny picture elements that contain information about the brightness or color of a particular location on the Earth’s surface.
3. Satellite images can be used to create maps, monitor changes in land use and vegetation cover, track weather patterns, and provide valuable information for a wide range of applications in various fields.

Question 4

In what way the satellite image is useful for Oceanography? 

Answer

Three ways satellite images are useful for oceanography:

1. They can monitor ocean temperature and currents, helping scientists to predict weather patterns, identify areas of upwelling, and track the movement of ocean eddies and other features.
2. They can be used to study the distribution and abundance of phytoplankton, which form the base of the ocean food chain and play a key role in regulating the Earth’s climate.
3. They can be used to monitor the growth and movement of sea ice, which is an important indicator of climate change in polar regions.

Question 5

Write the difference between visible imagery and infrared imagery.

Answer

Visible Imagery:

• Captured using the visible light spectrum.
• Shows the objects on the earth’s surface in their natural color.
• Useful for observing features like clouds, vegetation, water bodies, and land use patterns.

Infrared Imagery:

• Captured using the infrared spectrum.
• Shows temperature differences between objects and surfaces.
• Useful for identifying areas of high or low temperature.

Solve the puzzle from the clues given

Clues-

Across

(1) Satellite images of the earth are collected by ___________.

(2) It is the basic element of satellite images.

(3) The short form of Representative Fraction.

Down

(2) These satellites orbit at 800-900 km elevation.

(4) These satellite images can be taken at any time of the day.

(5) The abbreviated form of the name of first satellite launched by NASA in 1972.

Answer

Across: 1. Satellites 2. Pixel 3. R.F.

Down: 1. Polar-orbiting 2. Visible 3. ERTS-1

Long answer or essay-type questions

Question 1

What are satellites images? Discuss the points of differences of these images with topographical maps.

Answer

Satellite images are pictures of the Earth or other planets that are captured by satellites orbiting around them. These images can provide valuable information about the Earth’s surface, weather patterns, and other features.

Question 2

Write the uses of different types of scales on topographical maps.

Answer

Here are some uses of different types of scales on topographical maps:

1. Verbal Scale: It provides a description of the scale in words and is useful for general reference maps and tourist maps.
2. Fractional Scale: It expresses the scale as a fraction, where the numerator represents the map distance and the denominator represents the corresponding ground distance. It is useful for large-scale maps used for engineering, surveying, and land-use planning.
3. Linear Scale: It is a simple line drawn on the map, indicating a specific distance in units of measurement. It is useful for measuring distances on maps and is commonly used on maps of various scales.

Question 3

What are the steps followed? or acquisition of satellite images? 

Answer

The general steps followed in the acquisition of satellite images are as follows:

1. Tasking: The user requests a satellite image of a particular area of interest, specifying the required sensor, resolution, and other parameters.
2. Scheduling: The satellite operator schedules the acquisition of the requested image based on the satellite’s orbital path and availability.
3. Data acquisition: The satellite captures the image data using its onboard sensors and transmits it to a ground station.
4. Image processing: The raw data is processed into a usable image format, including corrections for atmospheric interference, sensor distortion, and other factors.
5. Image distribution: The processed image is distributed to the user via a digital download or physical media.

Question 4

Write the characteristics of satellite images.

Answer

The characteristics of satellite images are:

1. Spatial resolution: It refers to the level of detail that a satellite image can provide. The higher the spatial resolution, the more detailed the image will be.
2. Spectral resolution: It refers to the range of colors or wavelengths that a satellite sensor can detect. The more bands a sensor has, the better its spectral resolution.
3. Temporal resolution: It refers to the frequency at which a satellite passes over a particular area. The higher the temporal resolution, the more frequently the area can be imaged.
4. Radiometric resolution: It refers to the ability of a satellite sensor to distinguish between different levels of brightness or reflectance in an image.
5. Geometric accuracy: It refers to the degree to which a satellite image accurately represents the position and shape of features on the Earth’s surface.

Question 5

Write an account of the uses and importance of satellite images.

Answer

Satellite images have a wide range of uses and importance, including:

1. Weather forecasting: Satellite images provide real-time data on weather patterns and help meteorologists predict severe weather conditions.
2. Natural resource management: Satellite images are used to monitor and manage natural resources, including forests, water resources, and wildlife habitats.
3. Disaster management: Satellite images are crucial in disaster management, as they help identify affected areas, assess damage, and plan emergency response and recovery efforts.
4. Agriculture: Satellite images are used in agriculture to monitor crop health, estimate yields, and assess soil moisture levels.
5. Urban planning: Satellite images are used in urban planning to monitor urban growth, assess land use patterns, and plan infrastructure development.

Question 6

Satellite images are used as “the tools of a geographer”- Explain.

Answer

Here are some points explaining how satellite images are used as tools for geographers:

1. Remote Sensing: Satellite images provide a valuable source of remote sensing data, allowing geographers to study and analyze the physical and human geography of the earth’s surface from a distance.
2. Mapping: Satellite images can be used to create highly detailed and accurate maps of the earth’s surface, which are used by geographers to identify and analyze spatial patterns, distribution of resources, and changes over time.
3. Environmental Monitoring: Geographers use satellite images to monitor changes in the natural environment, such as deforestation, soil erosion, and water pollution. These images can help to identify the causes of environmental change and inform strategies for conservation and sustainable development.
4. Urban Planning: Satellite images can provide valuable information for urban planners, allowing them to analyze patterns of land use, transportation, and infrastructure development. This information can be used to inform decisions about zoning, land-use regulation, and transportation planning.

Also check out: Flasheducation.co.in

Check your progress with the Chapterwise geography test – Mock Test

Image credit : Freepik