Rotation and Revolution - Practice Test 4

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.The circle that divides the globe into day and night is called:

   • A.Circle of Illumination✓ Correct Answer
   • B.Great Circle
   • C.Arctic Circle
   • D.Prime Meridian

   Explanation: Repeated concept for reinforcement: Circle of Illumination.

2. Q2.The sun is overhead at the Tropic of Cancer on:

   • A.June 21✓ Correct Answer
   • B.December 22
   • C.March 21
   • D.September 23

   Explanation: June 21 is the Summer Solstice in the North.

3. Q3.The sun is overhead at the Tropic of Capricorn on:

   • A.December 22✓ Correct Answer
   • B.June 21
   • C.January 3
   • D.July 4

   Explanation: December 22 is the Winter Solstice (North) / Summer Solstice (South).

4. Q4.In the Northern Hemisphere, days are shorter than nights in:

   • A.Winter✓ Correct Answer
   • B.Summer
   • C.Spring
   • D.Autumn

   Explanation: In Winter, the hemisphere is tilted away from the Sun, making days shorter.

5. Q5.The Coriolis effect is zero at:

   • A.The Equator✓ Correct Answer
   • B.The Poles
   • C.Tropic of Cancer
   • D.45° Latitude

   Explanation: Coriolis force is zero at the Equator and maximum at the Poles.

6. Q6.If Earth stopped revolving but continued rotating, what would happen?

   • A.No Seasons✓ Correct Answer
   • B.Permanent Day
   • C.Permanent Night
   • D.No Tides

   Explanation: Seasons require revolution. Without it, climate bands would be fixed permanently.

7. Q7.The positions of Perihelion and Aphelion affect:

   • A.Severity of seasons✓ Correct Answer
   • B.Day and night length
   • C.Tides only
   • D.Rotation speed

   Explanation: Distance affects the amount of solar insolation slightly, moderating or intensifying seasons.

8. Q8.Which country is called the 'Land of the Rising Sun' due to Earth's rotation direction?

   • A.Japan✓ Correct Answer
   • B.Norway
   • C.UK
   • D.USA

   Explanation: Japan lies in the extreme East, seeing the sun first.

9. Q9.One degree of longitude equals how many kilometers at the Equator?

   • A.111 km✓ Correct Answer
   • B.100 km
   • C.90 km
   • D.120 km

   Explanation: 1° longitude at equator ≈ 111.32 km.

10. Q10.Foucault's Pendulum experiment provided proof of:

    • A.Earth's Rotation✓ Correct Answer
    • B.Earth's Revolution
    • C.Earth's curvature
    • D.Gravity

    Explanation: The pendulum's plane of oscillation appears to rotate, proving Earth spins beneath it.

11. Q11.The Earth moves in its orbit at a mean velocity of:

    • A.29.8 km/s✓ Correct Answer
    • B.18.5 km/s
    • C.40 km/s
    • D.1000 km/h

    Explanation: Approx 30 km/s (29.78 km/s).

12. Q12.The Tropic of Cancer is located at:

    • A.23.5° N✓ Correct Answer
    • B.23.5° S
    • C.66.5° N
    • D.0°

    Explanation: 23.5° North latitude.

13. Q13.The Tropic of Capricorn is located at:

    • A.23.5° S✓ Correct Answer
    • B.23.5° N
    • C.66.5° S
    • D.0°

    Explanation: 23.5° Southern latitude.

14. Q14.The Arctic Circle is located at:

    • A.66.5° N✓ Correct Answer
    • B.66.5° S
    • C.23.5° N
    • D.90° N

    Explanation: 66.5° North latitude.

15. Q15.The term 'Solstice' implies:

    • A.Sun standing still✓ Correct Answer
    • B.Sun moving fast
    • C.Equal day and night
    • D.Darkness

    Explanation: Solstice means 'Sun stands still' (sol + stitium) before reversing direction.

16. Q16.If the Earth's axis were vertical (0° tilt), what would happen?

    • A.No seasons anywhere✓ Correct Answer
    • B.Extreme seasons
    • C.Days always 24 hours
    • D.Nights always 24 hours

    Explanation: Without tilt, sun rays would hit latitudes at the same angle all year = No Seasons.

17. Q17.Which motion is responsible for the apparent daily motion of stars across the sky?

    • A.Rotation✓ Correct Answer
    • B.Revolution
    • C.Precession
    • D.Galactic movement

    Explanation: Stars appear to move East to West because Earth rotates West to East.

18. Q18.The time of day is determined by:

    • A.Longitude and Rotation✓ Correct Answer
    • B.Latitude and Revolution
    • C.Distance from Equator
    • D.Season

    Explanation: Time zones are based on Longitude and the rotation of Earth.

19. Q19.Standard Time is usually based on a meridian that is a multiple of:

    • A.7.5 degrees (30 mins)✓ Correct Answer
    • B.15 degrees (1 hour)
    • C.10 degrees
    • D.5 degrees

    Explanation: Most time zones are offset by 30 mins (7.5°) or 1 hour (15°).

20. Q20.India's Standard Time (IST) is ahead of Greenwich Mean Time (GMT) by:

    • A.5 hours 30 minutes✓ Correct Answer
    • B.5 hours
    • C.6 hours
    • D.4 hours 30 minutes

    Explanation: IST is based on 82.5° E. 82.5 × 4 = 330 mins = 5 hr 30 min.