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Movement of Earth

6 UPSC Prelims MCQs tagged "Movement of Earth". Free practice with answer keys, explanations, and timed mock tests on Anantam IAS.

Agriculture and Allied Activities 56 Money, Banking and Monetary Policy 43 Environmental Pollution 43 Biotechnology 37 Parliament 33 Climate Change 32 Finance and Financial Markets 29 Emerging Technologies 28 Trade and External Sector 26 Life Sciences 26 Core Concepts and Foundational Science 20 Public Finance in India 19 International Environmental Framework 18 Continents 18 Religions in India 18 Fundamental Rights 18 Concept and Salient Features of the Constitution 17 Indian Biodiversity - Fauna 17 Renewable Energy 16 Major Physical Divisions of India 16 Multilateral Groupings 16 International Institutions 15 Art and Architecture 15 Drainage System 15 Institutional Measures for Environment Conservation 14 Regional Groupings 14 Rivers and Drainage 14 Infrastructure and Investment Models in India 14 Atmosphere 13 Space Technology 13

  1. Consider the following statements: I. Anadyr in Siberia and Nome in Alaska are a…

    Consider the following statements: I. Anadyr in Siberia and Nome in Alaska are a few kilometers from each other, but when people are waking up and getting set for breakfast in these cities, it would be different days. II. When it is Monday in Anadyr, it is Tuesday in Nome. Which of the statements given above is/are correct?

    1. AI only
    2. BII only
    3. CBoth I and II
    4. DNeither I nor II
    Answer and explanation

    Correct answer: A

    Anadyr (Russia) and Nome (Alaska, USA) lie close to each other geographically but are separated by the International Date Line, leading to a significant difference in calendar dates despite similar times of day.

    Statement I: Correct Due to the International Date Line, Anadyr and Nome can have the same time of day but different dates.

    Statement II: Incorrect When it's Monday in Anadyr, it is still Sunday in Nome, not Tuesday—Anadyr is ahead of Nome by almost 21 hours.

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    Geography UPSC 2025 Hard

  2. Consider the following statements: Statement I: Scientific studies suggest that a shift is taking…

    Consider the following statements: Statement I: Scientific studies suggest that a shift is taking place in the Earth's rotation and axis. Statement II: Solar flares and associated coronal mass ejections bombarded the Earth's outermost atmosphere with tremendous amount of energy. Statement III: As the Earth's polar ice melts, the water tends to move towards the equator. Which one of the following is correct in respect of the above statements?

    1. ABoth Statement II and Statement III are correct and both of them explain Statement I
    2. BBoth Statement II and Statement III are correct but only one of them explains Statement I
    3. COnly one of the Statements II and III is correct and that explains Statement I
    4. DNeither Statement II nor Statement III is correct
    Answer and explanation

    Correct answer: B

    Statement I is correct: Satellite data (such as the GRACE mission) has confirmed that the Earth's rotational axis is drifting and the speed of rotation is slightly changing. Since the late 20th century, this "Polar Drift" has accelerated and shifted direction.

    Statement II is correct: Solar flares and Coronal Mass Ejections (CMEs) release high-energy particles and radiation that impact the Earth's thermosphere and magnetosphere. While this causes geomagnetic storms and affects satellite drag, it has no significant impact on the orientation of the Earth's rotational axis.

    Statement III is correct: When massive polar ice sheets melt, the resulting water is redistributed. Due to centrifugal force, this water accumulates more near the equator than at the poles. This represents a major surface mass redistribution.

    The Relationship: Statement III explains Statement I. In physics, when the mass of a rotating sphere is moved from the axis (the poles) toward the perimeter (the equator), the "Moment of Inertia" increases, causing a shift in the axis of rotation and a slight slowing of the rotation speed.

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    Geography UPSC 2025 Medium

  3. On June 21 every year, which of the following latitude(s) experience(s) a sunlight of…

    On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours? 1. Equator 2. Tropic of Cancer 3. Tropic of Capricorn 4. Arctic Circle Select the correct answer using the code given below :

    1. A1 only
    2. B2 only
    3. C3 and 4
    4. D2 and 4
    Answer and explanation

    Correct answer: D

    Statement 1 (Equator) is incorrect: The Equator experiences exactly 12 hours of daylight throughout the year, as it lies midway between the poles and the sun's rays fall almost equally throughout the year.

    Statement 2 (Tropic of Cancer) is correct: On June 21 (Summer Solstice), the Northern Hemisphere is tilted toward the Sun, and the Tropic of Cancer (23.5° N) receives the direct rays of the Sun. Hence, regions along this latitude experience more than 12 hours of daylight.

    Statement 3 (Tropic of Capricorn) is incorrect: The Tropic of Capricorn (23.5° S) lies in the Southern Hemisphere, which is tilted away from the Sun on June 21. Therefore, it experiences less than 12 hours of daylight.

    Statement 4 (Arctic Circle) is correct: On June 21, the Arctic Circle (66.5° N) experiences 24 hours of continuous daylight — known as the Midnight Sun phenomenon.

    Therefore, both the Tropic of Cancer and the Arctic Circle experience more than 12 hours of daylight on June 21st.

    ![Movement of Earth](https://d39jluplm5thpx.cloudfront.net//movement_of_earth_51975c8fb7.png)

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    Geography UPSC 2024 Easy

  4. On 21st June, the Sun

    On 21st June, the Sun

    1. Adoes not set below the horizon at the Arctic Circle
    2. Bdoes not set below the horizon at Antarctic Circle
    3. Cshines vertically overhead at noon on the Equator
    4. Dshines vertically overhead at the Tropic of Capricorn
    Answer and explanation

    Correct answer: A

    * The summer solstice is the day with the longest period of daylight and the shortest night of the year. It occurs when one of the Earth's poles has its maximum tilt toward the Sun.

    ![Earth Revolution](https://d39jluplm5thpx.cloudfront.net//Earth_Revolution_1_6224c3eabe.jpg)

    * On 21st June, the summer solstice occurs in the Northern Hemisphere. This is the longest day of the year for that hemisphere.

    * The Arctic Circle, which is in the Northern Hemisphere, experiences continuous daylight throughout this day. This is because the tilt of the Earth's axis is such that the North Pole is facing towards the Sun.

    * Therefore, the Sun does not set below the horizon at the Arctic Circle on this day.

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    Geography UPSC 2019 Medium

  5. In the northern hemisphere, the longest day of the year normally occurs in the:

    In the northern hemisphere, the longest day of the year normally occurs in the:

    1. AFirst half of the month of June
    2. BSecond half of the month of June
    3. CFirst half of the month of July
    4. DSecond half of the month of July
    Answer and explanation

    Correct answer: B

    The longest day of the year in the northern hemisphere, also known as the summer solstice, typically occurs in the second half of the month of June.

    This is when the sun is directly over the Tropic of Cancer, or more specifically right over 23.5-degree north latitude.

    The exact date can vary slightly from year to year, but it is usually on June 20th or 21st.

    ![Summer Solstice](https://d39jluplm5thpx.cloudfront.net//summer_solstice_19ce1c5584.jpg)

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    Geography UPSC 2022 Easy

  6. Variations in the length of daytime and nighttime from season to season are due…

    Variations in the length of daytime and nighttime from season to season are due to -

    1. AThe earth's rotation on its axis
    2. BRevolution of the earth on a tilted axis
    3. CLatitudinal position of the place
    4. DThe earth's revolution around the sun in an elliptical manner
    Answer and explanation

    Correct answer: B

    The Earth's axis is tilted at an angle of 23.5 degrees relative to its path around the Sun. This tilt means that different parts of the Earth receive direct sunlight for varying lengths of time throughout the year, leading to seasonal changes in day and night length.

    Hence, the correct answer is B.

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    Geography UPSC 2013 Easy