Karnataka State Board Social Science Geography Class 8 Chapter 1 The Earth Our Living Planet Exercise Question and Answer.
(1). The total geographical area of the Earth is ______ sq. kms. – 510 million .
(2). The shape of the Earth is ______. – Geoid.
(3). The equatorial and polar diameters of the Earth is ______ and _____ kms. – 12,756 km.
(4). The 23½0 North latitude is called as _____. 5. – Tropic of cancer.
The Indian Standard Time is based on _____ Longitude. – 82 1/2 ̊east longitude .
(II.) (1). Why is the Earth called ‘Living Planet’?
Ans:- Earth is the only planet in the solar system in which life has been transmitted. It is the home for all forms of life like plants , animal, and human beings because its suitable distance from the sun , range of temperature, life supporting gases, water cycle, etc. and the rest of the planets do not have such facilities so the only life on earth has transmitted.
(3). What are latitudes and longitudes?
Ans:- latitude is an imaginary line which joins all the places which have the some angular distance north or south of the equator.
The imaginary lines that intersect equator at right angle joining the north and south are called longitude.
(5). What is the International Date Line?
Ans:- A line passing through 180 ̊meridian diametrically opposite to the G.M.T was adopted as the point where circumnavigators should make adjustments. This line is supposed to pass Pacific Ocean along the 180 ̊ meridian but makes short detours in order to avoid land masses. This is known as the International Date Line because the date and day changed whenever people cross this line by ship or airplanes.
(III.) (1). Unique planet – Earth
(2). Equator – 0 ̊
(3). Geoid – Shape of earth
(4). Continents – The land bodies of the earth
(5). Prime Meridian – Greenwich
(6). Indian Standard Time – 82 1/2 ̊ east longitude
Terms to Remember:
(1). Living Planet – Earth
(2). Geoid – The shape of earth
(3). Arctic circle – 66 1/2o North latitude
(4). Antarctic circle – 66 1/2o South latitude
(6). International date line – 180 ̊ meridian.