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Physics CBSE Live product
Class 8 (2025-26)
Keeping time with the skies
Revision I - Keeping time with the skies
8.
Time, calendars, and seasons
Question:
3
m.
Select the best answer:
1
.
Solar year
-
The time taken by the Sun to move from east to west across the sky in one day
The time the Earth takes to complete one full revolution around the Sun, nearly \(365\tfrac{1}{4}\) days
The time taken by the Moon to complete all its phases from new moon to new moon
The time taken by the Earth to complete one full rotation on its axis, causing day and night
2
.
Lunar month
-
The time taken by the Moon to rotate once on its axis, lasting \(24\) hours
The natural time period based on the Moon’s phases, lasting about \(29.5\) days
The time the Earth takes to move around the Sun once, forming a year
The average length of a month in the solar calendar, fixed at \(30\) days
3
.
Solar calendar
-
A system that counts months strictly as \(29.5\) days throughout the year
A calendar that follows only the Moon’s phases without considering seasonal changes
A calendar system designed to match the seasons, based on the Earth’s revolution around the Sun
A calendar that measures time only by the daily position of the Sun at noon
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