Q1
How long does Earth's rotation take?
A24 hours
B365 days
C30 days
D12 hours
ICSEClass 9 (ICSE)GeographyCh 3 · Topic 1
Rotation and Revolution of the Earth
Earth's rotation on its axis causes day and night, while its revolution around the Sun causes the changing seasons throughout the year.
Core concept
Earth rotates on its axis once every 24 hours, causing the cycle of day and night as different parts face or turn away from the Sun.
How it works
Earth revolves around the Sun once every 365.25 days, completing one full orbit that we call a year.
Why it matters
The tilt of Earth's axis (about 23.5°) combined with its revolution causes the changing seasons, as different hemispheres receive varying sunlight.
Key detail
Understanding rotation and revolution helps explain daily and yearly patterns we experience, like sunrise, sunset, and seasonal changes.
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• Earth rotates on its axis every 24 hours.
• This causes day and night.
• Earth revolves around the Sun every 365.25 days.
• This completes one year.
• Earth's axis is tilted about 23.5°.
• This tilt, with revolution, causes seasons.
• Different hemispheres get varying sunlight.
• Rotation and revolution explain daily and yearly patterns.