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Geotectonics - Geography GK Objective Questions with Answers | Page-11

Questions
51 What is the time difference between longitudes ?
A 5 minutes
B 5 minutes 20 seconds
C 4 minutes
D 4 minutes 20 seconds

Answer: Option [C]

The correct answer is 4 minutes. Each of these longitudes is called a degree. The 0 degree longitude passing through Greenwich, near London, is considered as standard and the time of all other time zones are calculated accordingly. The time difference between each longitude (each degree) is 4 minutes

52 The time required for the earth to return to a given point in its orbit with reference to fixed star is :
A Lunar year
B Solar year
C Tropcal year
D Sidereal year

Answer: Option [D]

The correct answer is Sidereal year. Sidereal time is time measured with respect to the apparent motion of the 'fixed' stars in the sky due to the Earth's rotation.

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53 The Earth is an oblate spheroid and not a perfect sphere. This is because :
I. The Earth has a rotational motion and the rotational speed increases as one goes from the Poles towards the Equator.
II. The Equator experiences greater gravitional pull from the Sun.
III. The intensity of sunlight received at the Equator is greater than that at the Poles.
A I only
B I and II
C III only
D I, II and III

Answer: Option [B]

The Earth is an oblate spheroid and not a perfect sphere. This is because

  • The Earth has a rotational motion and the rotational speed increases as one goes from the Poles towards the Equator.
  • The Equator experiences greater gravitional pull from the Sun.
  • 54 Consider the following statements :

    Which of these statements are correct?

    I.Earth is the fourth largest planet of the solar system
    II. The circumference of Earth is about 40000 KM
    III. Earth's Polar diameter is about 43 KM shorter than its equatorial diameter
    IV. The total surface area of Earth is about 510 million square KM
    A I and II
    B III and IV
    C I, II and III
    D II, III and IV

    Answer: Option [D]

    The correct statements are

    • The circumference of Earth is about 40000 KM
    • Earth's Polar diameter is about 43 KM shorter than its equatorial diameter
    • The total surface area of Earth is about 510 million square KM
    55 How many kilometers are represented by 1 degree of latitude ?
    A 191 KM
    B 161 KM
    C 141 KM
    D 111 KM

    Answer: Option [D]

    The correct answer is 111 KM. One degree of latitude, called an arc degree, covers about 111 kilometers (69 miles). Because of Earth's curvature, the farther the circles are from the Equator, the smaller they are. At the North and South Poles, arc degrees are simply points. Degrees of latitude are divided into 60 minutes.

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