81. Variation in duration of day and night is due to:
1. rotation of earth on its axis
2. revolution of earth around the sun
3. inclination of earth at an angle of 66%.
1. rotation of earth on its axis
2. revolution of earth around the sun
3. inclination of earth at an angle of 66%.
82. The axis of rotation of earth is tilted by 23.5° to the plane of revolution around the sun. The latitude of Mumbai is less than 23.5° whereas the latitude of Delhi is more than 23.5°. Which one of the following statements in this regard is correct?
83. The point below the surface where an earthquake originates is called ________.
84. The distance between two consecutive longitudes (91° E and 92° E) at the Poles is
85. The place which has the longest day and the shortest night on 22nd December, is ________
86. Which of the following is caused by the combine deffects of the gravitational forces exerted by the Moon and the Sun on sea levels?
87. Which of the following phenomenon is/are the effect of the rotation of the Earth?
1. Apparent movement of the Sun, the Moon and the Stars.
2. Flatness of the poles and bulge at the Equator.
3. Occurrence of sunrise, noon and sunset
4. Magnetic field of the earth.
1. Apparent movement of the Sun, the Moon and the Stars.
2. Flatness of the poles and bulge at the Equator.
3. Occurrence of sunrise, noon and sunset
4. Magnetic field of the earth.
88. Japan is called 'land of the rising sun' because ________
89. Which of the following celestial body contains Helium-4 in abundance?
90. In the context of 'time' GMT means
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