Question Paper
Class / Subject: Class 8 (CBSE) · Science
Chapter: Chapter 11 — Chapter 11: Keeping Time with the Skies
Time Allowed: 15 minutes
Max Marks: 6
1. A sundial measures time using: [1]
(A) the Sun's shadow
(B) flowing water
(C) burning wax
(D) star positions only
2. A key limitation of a sundial is that it: [1]
(A) does not work at night or on cloudy days
(B) is always perfectly accurate
(C) works underwater
(D) never needs the Sun
3. A water clock is also known as a: [1]
(A) clepsydra
(B) sundial
(C) pendulum clock
(D) candle clock
4. A leap year has: [1]
(A) 366 days
(B) 365 days
(C) 364 days
(D) 367 days
5. Modern atomic clocks measure time based on: [1]
(A) atomic vibrations
(B) water flow
(C) candle burning
(D) shadow movement
6. A calendar based on the Moon's cycles is called a: [1]
(A) lunar calendar
(B) solar calendar
(C) atomic calendar
(D) Gregorian calendar only