Complete the following tables
No Scale
Real distance Distance in the map
1
lom = 1km
15 km
22cm = 2 km
hocm
3 3cm = 1 km 45 km
4 11cm = 1.5 km bo km
511cm = lo km
25cm
Answers
Answer:
Practical Work in Geography Class 11 Solutions Chapter 2 Map Scale
Class 11 Practical Work in Geography Chapter 2 NCERT Textbook Questions Solved
1. Choose the right answer from the four alternatives given below:
Question 1(i).
Which one of the following methods of scale is a universal method?
(a) Simple Statement
(b) Representative Fraction
(c) Graphical Scale
(d) None of the above
Answer:
(b) Representative fraction
Question 1(ii).
Map distance in a scale is also known as:
(a) Numerator
(b) Denominator
(c) Statement of Scale
(d) Representative Fraction
Answer:
(a) Numerator
Question 1(iii).
‘Numerator’ in scale represents:
(a) Ground distance
(b) Map distance
(c) Both the distances
(d) None of the above
Answer:
(a) Ground Distance
2. Answer the following questions in about 30 words:
Question 2(i).
What are the two different systems of measurement?
Answer:
Kilometre, metre, centimetre etc. are used to measure the linear distances between two points on the ground. It is referred to as the Metric System of Measurement and presently used in India and many other countries of the world.
Another units which are used are miles, furlongs, yards, feet, etc. These are two different systems of measurement of the distances used in different countries of the world. It is known as the English System of Measurement and is prevalent in both the United States and the United Kingdom. India also used this system for measuring/showing linear distances before 1957.
Question 2(ii).
Give one example each of statement of scale in Metric and English system.
Answer:
Metric System of Measurement
1 km = 1000 Metres
1 Metre = 100 Centimetres
1 Centimetre = 10 Millimetres
English System of Measurement
1 Mile = 8 Furlongs
1 Furlong = 220 Yards
1 Yard = 3 feet
1 Foot = 12 Inches.
Question 2(iii).
Why is the Representative Fraction method called a Universal method?
Answer:
Causes for the representative method being called universal:
It shows the relationship between the map distance and the corresponding ground distance in units of length.
The use of units to express the scale makes it the most versatile method.
R. F. is generally shown in fraction because it shows how much the real world is reduced to fit on the map.
For example, a fraction of 1 : 2,50,000 shows that one unit of length on the map represents 2,50,000 of the same units on the ground i.e. one mm, one cm or one inch on the map representing 2,50,000 mm, 2,50,000 cm and 2,50,000 inches, respectively of the ground.
While converting the fraction of units into Metric or English systems, units in centimetre or inch are normally used by convention. This quality of expressing scale in units in R. F. makes it a universally acceptable and usable method.
Question 2(iv).
What are the major advantages of the graphical method?
Answer:
This type of scale shows map distances and the corresponding ground distances using a line bar with primary and secondary divisions marked on it. This is referred to as the graphical scale or bar scale.
Advantages:
It can express scale not only in kilometres and metres but the readings may also be shown in miles and furlongs.
Unlike the statement of the scale method, the graphical scale stands valid even when the map is reduced or enlarged. This is the unique advantage of the graphical method of the map scale.
3. Convert the given Statement of Scale into Representative Fraction (R. F.).
Question 3(i)
5 cm represents 10 km
Answer:
Representative Fraction
Practical Work in Geography Class 11 Solutions Chapter 2 Map Scale Q3
Distance on Map = 5 cm
Distance on Ground = 10 km
Representative Fraction
= 510
= 12 km or 2,00,000
Therefore representative fraction
= 1 : 2,00,000 cm
Question 3(ii).
2 inches represents 4 miles
Answer:
Representative Fraction
Practical Work in Geography Class 11 Solutions Chapter 2 Map Scale Q3
2 inches = 4 miles
therefore, 1 inch = 2 miles (63,360 × 2)
1 inch on map = 1,26,720 inches on ground.
Therefore representative fraction
= 1:1,26, 720
Question 3(iii).
1 inch represents 1 yard
Answer:
Representative Fraction
= 136
Distance on Map = 1 inch
Distance on Ground = 1 yard
1 yard = 36 inches
Representative Fraction =
Practical Work in Geography Class 11 Solutions Chapter 2 Map Scale Q3
Therefore representative fraction = 1:36
Question 3(iv).
1 cm represents 100 metres
Answer:
Representative Fraction
Practical Work in Geography Class 11 Solutions Chapter 2 Map Scale Q3
Distance on Map = 1 cm
Distance on Ground = 100 meters
1 cm = 100 meters
Representative Fraction =
= 110,000
Therefore representative fraction
= 1 : 10,000
4. Convert the given Representative Fraction (R. F.) into Statement of Scale in the System of Measurement shown in parentheses:
Question 4(i).
1 : 100,000 (into km)
Answer:
It means 1,00,000 cm on map represents 1 km on ground.
It means 1,00,000 centimetre on map represents 1,00,000 cm on ground.
Therefore, 1 cm represents 1 km
.