Rotation and Revolution - Practice Test 2

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

1. Q1.When the Earth is farthest from the Sun, the position is called:

   • A.Aphelion✓ Correct Answer
   • B.Perihelion
   • C.Equinox
   • D.Nadir

   Explanation: Aphelion is the point where Earth is farthest from the Sun.

2. Q2.Perihelion usually occurs on:

   • A.July 4
   • B.January 3✓ Correct Answer
   • C.March 21
   • D.September 23

   Explanation: Earth reaches Perihelion around January 3rd each year.

3. Q3.Aphelion usually occurs on:

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

   Explanation: Earth reaches Aphelion around July 4th each year.

4. Q4.The variation in the length of day and night is due to:

   • A.Rotation only
   • B.Revolution only
   • C.Earth's tilted axis and Revolution✓ Correct Answer
   • D.Distance from Moon

   Explanation: The tilt of the Earth's axis while revolving around the Sun causes variations in day length.

5. Q5.At the Equator, the duration of day and night is:

   • A.Always equal✓ Correct Answer
   • B.Longer days in summer
   • C.Longer nights in winter
   • D.Variable

   Explanation: At the Equator, days and nights are approximately 12 hours each throughout the year.

6. Q6.Which phenomenon leads to the bulging of Earth at the equator and flattening at poles?

   • A.Revolution
   • B.Rotation✓ Correct Answer
   • C.Tides
   • D.Winds

   Explanation: Centrifugal force generated by Earth's rotation causes the equatorial bulge.

7. Q7.The speed of Earth's rotation is maximum at:

   • A.Poles
   • B.Equator✓ Correct Answer
   • C.Tropic of Cancer
   • D.Arctic Circle

   Explanation: Rotation speed is highest at the Equator (approx 1670 km/h) and zero at the poles.

8. Q8.If the Earth did not rotate, what would happen?

   • A.One side would be permanently hot, other freezing✓ Correct Answer
   • B.No seasons
   • C.No tides
   • D.All of the above

   Explanation: Without rotation, one half would face the Sun continuously (extreme heat) and the other would be in darkness (extreme cold).

9. Q9.Which force is generated by Earth's rotation that deflects winds and ocean currents?

   • A.Gravitational Force
   • B.Centripetal Force
   • C.Coriolis Force✓ Correct Answer
   • D.Magnetic Force

   Explanation: The Coriolis Force is an inertial force caused by Earth's rotation, deflecting moving objects.

10. Q10.Due to Coriolis Force, winds in the Northern Hemisphere deflect to their:

    • A.Left
    • B.Right✓ Correct Answer
    • C.Up
    • D.Down

    Explanation: Winds deflect to the Right in the Northern Hemisphere and Left in the Southern Hemisphere (Ferrel's Law).

11. Q11.The concept of 'Midnight Sun' is observed in:

    • A.Equatorial regions
    • B.Tropical regions
    • C.Polar regions (Arctic/Antarctic circles)✓ Correct Answer
    • D.Desert regions

    Explanation: The Midnight Sun occurs in polar regions during their respective summer solstices due to axial tilt.

12. Q12.Norway is known as the 'Land of Midnight Sun'. This phenomenon occurs during:

    • A.Winter in Northern Hemisphere
    • B.Summer in Northern Hemisphere✓ Correct Answer
    • C.Equinoxes
    • D.Winter in Southern Hemisphere

    Explanation: It occurs around June 21 when the North Pole is tilted towards the Sun.

13. Q13.On September 23, it is ___ season in the Northern Hemisphere.

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

    Explanation: September 23 marks the Autumnal Equinox in the Northern Hemisphere.

14. Q14.On March 21, it is ___ season in the Southern Hemisphere.

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

    Explanation: March 21 is Spring in the North but Autumn in the South.

15. Q15.When does the Sun appear to move from the Tropic of Cancer towards the Equator?

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

    Explanation: After the Summer Solstice (June 21), the Sun's apparent movement is southward (Dakshinayan).

16. Q16.The Christmas festival is celebrated in summer in which country?

    • A.USA
    • B.India
    • C.Australia✓ Correct Answer
    • D.UK

    Explanation: Australia is in the Southern Hemisphere, so December is their summer season.

17. Q17.The apparent movement of the Sun towards the North is called:

    • A.Dakshinayan
    • B.Uttarayan✓ Correct Answer
    • C.Equinox
    • D.Solstice

    Explanation: Uttarayan is the northward movement of the Sun from Capricorn to Cancer (Dec 22 to June 21).

18. Q18.What happens to the length of daylight as one moves from the equator to the poles in summer?

    • A.Increases✓ Correct Answer
    • B.Decreases
    • C.Remains same
    • D.Becomes zero

    Explanation: In summer, day length increases towards the pole, reaching 24 hours at the pole itself.

19. Q19.The time difference between two consecutive longitudes (1 degree apart) is:

    • A.15 minutes
    • B.4 minutes✓ Correct Answer
    • C.1 hour
    • D.30 minutes

    Explanation: Earth rotates 360° in 24 hours, so 1° takes 4 minutes.

20. Q20.If it is 12 Noon at Greenwich (0°), what is the time at 15° East?

    • A.11 AM
    • B.1 PM✓ Correct Answer
    • C.12 AM
    • D.2 PM

    Explanation: East is ahead. 15° × 4 min = 60 min = 1 hour ahead. So, 1 PM.