91. One degree of longitude on the equator is equal to a distance of ________
92. How much is the difference of time between any two consecutive longitudes?
93. Albedo is defined as ________
94. When the clock strikes 12:00 noon at Greenwich, it strikes 5:30 p.m. at place X on the same day. What is the meridian of longitude of place X ?
95. The approximate diameter of the earth is ________
96. The speed of rotation of the earth is ________
97. The area of the Earth's total surface is of the order of ________.
98. The distance of the equator from either of the poles is ________
99. The Earth rotates-around an axis pointing towards ________
100. When a ship crosses Date line from west to east ________
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