NCERT Class 6 Geography — Chapter 1: Motions of the Earth

mcqeasy

On 23rd September, what season is experienced in the Northern Hemisphere?

Official previous-year question

Verified 1 Aug 2026.

Options

ASummer
BWinter
CSpring
DAutumn

Did you get this right?

Solution

The correct option is

Autumn

Explanation

The phenomenon of seasons is caused by the Earth's revolution around the Sun and the tilt of its axis. This results in the apparent movement of the Sun relative to the Earth, creating specific positions known as Solstices and Equinoxes.

Analysis of the Date (23rd September):

Position of the Sun: On 23rd September, the Sun’s rays fall vertically on the Equator. This position is known as an Equinox.
Day and Night: During an equinox, the circle of illumination passes through both poles, resulting in equal durations of day and night (12 hours each) all over the globe.
Season in the Northern Hemisphere: This date marks the Autumnal Equinox for the Northern Hemisphere. It signifies the transition from Summer to Winter, and the season experienced is Autumn.
Season in the Southern Hemisphere: Conversely, the Southern Hemisphere experiences the Vernal (Spring) Equinox on this date.

Key Takeaway: 23rd September marks the Autumnal Equinox in the Northern Hemisphere, characterized by the Autumn season and equal lengths of day and night.

Your note

More from Chapter 1: Motions of the Earth

With reference to the motions of the Earth, consider the following statements: 1. Rotation is the movement of the Earth on its axis. 2. Revolution is the movement of the Earth around the Sun in a perfectly circular orbit. 3. The axis of the Earth is a physical line connecting the North and South Poles. Which of the statements given above is/are correct?

easy

With reference to the geometry of the Earth, what angle does the Earth's axis make with its orbital plane?

easy

In the context of Earth's geometry, the term "Orbital Plane" refers to:

medium

Consider the following statements regarding the "Circle of Illumination": 1. It is the circle that divides the day from night on the globe. 2. It coincides exactly with the axis of the Earth. Which of the statements given above is/are correct?

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Which one of the following factors is primarily responsible for the phenomenon where only half of the Earth receives sunlight at any given time?

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The correct option is

Autumn

Explanation

Analysis of the Date (23rd September):

Position of the Sun: On 23rd September, the Sun’s rays fall vertically on the Equator. This position is known as an Equinox.
Day and Night: During an equinox, the circle of illumination passes through both poles, resulting in equal durations of day and night (12 hours each) all over the globe.
Season in the Northern Hemisphere: This date marks the Autumnal Equinox for the Northern Hemisphere. It signifies the transition from Summer to Winter, and the season experienced is Autumn.
Season in the Southern Hemisphere: Conversely, the Southern Hemisphere experiences the Vernal (Spring) Equinox on this date.

Key Takeaway: 23rd September marks the Autumnal Equinox in the Northern Hemisphere, characterized by the Autumn season and equal lengths of day and night.