Rotation and Revolution — Important Questions
ICSE · Class 9 · Geography
53 important questions from Rotation and Revolution for ICSE Class 9 Geography, with answers. Part of the ICSE Class 9 Geography syllabus.
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Important Questions from Rotation and Revolution
Why does the Sun appear to rise in the east and set in the west?
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Because the Earth rotates from West to East
The Sun seems to move in the sky only because Earth is rotating from West to East.
What is the imaginary line that shows the boundary between day and night on Earth called?
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Circle of Illumination
The Circle of Illumination is the line that clearly separates the lit half of Earth from the dark half.
Which movement of the Earth causes seasons?
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Revolution
Seasons are caused by the Earth’s revolution around the Sun along with the tilted axis.
What is the sidereal day?
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The time taken by Earth to rotate relative to the stars
The sidereal day is the period of rotation measured with reference to the stars.
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