Mapping Skills Book Back Questions 9th Social Science Lesson 18

9th Social Science Lesson 18

18] Mapping Skills

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

A cartographer is one who measures, analyses and interprets geographical information to create maps and charts for political, cultural and educational purposes.

Mnemonic device or memory technique to recall cardinal directions is the sentence “Never Eat Soggy Wheaties”. (North, East, South and West)

The mainland of India extends from 8^o4’N to 37^o6’N latitude and from 68^o7’E to 97^o25’E longitude. Here, (^o) is degree and (‘) is minutes.

The actual shape of the Earth is termed Geoid, which is an oblate spheroid. The “azimuthal” polar projection is depicted on the United Nations flag. North America was prominent on the initial 1945 UN flag (which had the longitude line 90 degrees west pointing upwards) . The following year, the map on the flag was reoriented to be more neutral by having the International Date Line (180 degrees east, lying in the middle of the Pacific Ocean) pointing upwards. The map ends at 60 degrees South latitude, meaning Antarctica does not appear.

We operate three remote sensing organs in our body. (a) Eyes – Sense of sight.

(b) Nose – Sense of smell.

(c) Ear – Sense of hearing.

Early History of Surveying: In Egypt, surveyors were called ‘rope stretchers’ because they used ropes to measure distances.

Felix Nadar was a French photographer, journalist, novelist and balloonist. In 1858, he became the first person to take aerial photographs. He took his first photograph in 1853 and pioneered the use of artificial lighting in photography, working in the catacombs of Paris. Around 1863, Nadar built a huge (6000 m³) balloon named Le Geant (“The Giant”) .

Choose the best answers:

1. _____________ indicates the purpose or theme of the map.

(a) Title

(b) Scale

(c) Direction

(d) Legend

2. Standard symbols that are used in maps to convey a definite meaning are called ______________

(a) Conventional signs and symbols

(b) Coordinates

(c) Grid references

(d) Directions

3. GPS consists of a constellation of ______________ satellites.

(a) 7

(b) 24

(c) 32

(d) 64

Match the following:

1. The art and science of mapping – USA

2. Actual shape of the earth – Geoid

3. NAVSTAR – Cartography

Consider the following the statements and tick the appropriate answer:

1. Assertion (A): The points at which the vertical and horizontal lines of the grid intersect are called coordinates.

Reason (R): The lines that run horizontally and vertically are called Northings and Easting respectively.

(a) Both A and R are true; R explains A

(b) Both A and R are true; R does not explain A

(c) A is correct; R is false

(d) A is false; R is true

2. Assertion (A): The legend of a map does not help us to understand the information in a map.

Reason (R): Tit is usually placed at the left or right corner at the bottom of the map.

(a) A is false; R is true

(b) Both A and R are true; R does not explain A

(c) A is correct; R is false

(d) Both A and R are true; R explains A

Answers:

Choose the correct answers:

1. Title 2. Conventional signs and symbols 3. 24

Match the following:

1. Cartography 2. Geoid 3. USA

Consider the following statements and choose the correct answer:

1. Both A and R are true; R does not explain A

2. A is false; R is true