With reference to Time and Longitude, consider the following statements: 1. The best means of measuring time is by the movement of the earth, moon, and planets. 2. Local time can be reckoned by the shadow cast by the sun, which is longest at noon. 3. When the Prime Meridian has the sun at the highest point, all places along this meridian have mid-day. Which of the statements given above is/are correct?

The correct option is (c) 1 and 3 only. Explanation Time measurement is fundamentally based on the regular and predictable movements of celestial bodies. Geographically, local time is determined by the position of the sun relative to a specific longitude. - Statement 1 is Correct: The regular movement of the earth, moon, and planets serves as the best means of measuring time. The earth’s rotation defines the day, its revolution defines the year, and the moon’s orbit defines the month. These natural cycles are the basis for standard timekeeping. - Statement 2 is Incorrect: Local time can indeed be reckoned by the shadow cast by the sun; however, the shadow is shortest at noon (when the sun is directly overhead or at its highest point) and longest at sunrise and sunset. - Statement 3 is Correct: When the Prime Meridian of Greenwich (0° Longitude) has the sun at the highest point in the sky, all places along this meridian experience mid-day or noon simultaneously. This principle applies to any specific meridian. Key Takeaway: Noon is defined by the sun reaching its highest point in the sky over a specific meridian, which corresponds to the time of the day when shadows are the shortest.

With reference to Time and Longitude,… - NCERT Class 6 Geography MCQ

NCERT Class 6 Geography — Chapter 1: Globe: Latitudes and Longitudes

mcqmedium

With reference to Time and Longitude, consider the following statements:

The best means of measuring time is by the movement of the earth, moon, and planets.
Local time can be reckoned by the shadow cast by the sun, which is longest at noon.
When the Prime Meridian has the sun at the highest point, all places along this meridian have mid-day.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT The Earth Our Habitat · Page 15

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (c) 1 and 3 only.

Explanation

Time measurement is fundamentally based on the regular and predictable movements of celestial bodies. Geographically, local time is determined by the position of the sun relative to a specific longitude.

Statement 1 is Correct: The regular movement of the earth, moon, and planets serves as the best means of measuring time. The earth’s rotation defines the day, its revolution defines the year, and the moon’s orbit defines the month. These natural cycles are the basis for standard timekeeping.
Statement 2 is Incorrect: Local time can indeed be reckoned by the shadow cast by the sun; however, the shadow is shortest at noon (when the sun is directly overhead or at its highest point) and longest at sunrise and sunset.
Statement 3 is Correct: When the Prime Meridian of Greenwich (0° Longitude) has the sun at the highest point in the sky, all places along this meridian experience mid-day or noon simultaneously. This principle applies to any specific meridian.

Key Takeaway: Noon is defined by the sun reaching its highest point in the sky over a specific meridian, which corresponds to the time of the day when shadows are the shortest.

Your note

More from Chapter 1: Globe: Latitudes and Longitudes

Which of the following factors primarily accounts for the moderate temperatures characterizing the Temperate Zones?

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Which of the following statements is correct regarding the "Arctic Circle"?

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Consider the following pairs of Important Parallels: 1. Tropic of Cancer : 23½° S 2. Tropic of Capricorn : 23½° N 3. Arctic Circle : 66½° N 4. Antarctic Circle : 66½° S How many of the above pairs are correctly matched?

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Match List I with List II and select the correct answer using the code given below: List I | List II A. Torrid Zone | 1. Sun does not rise much above the horizon B. Temperate Zone | 2. Sun never shines overhead C. Frigid Zone | 3. Maximum heat

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The Earth rotates from West to East. Which of the following is a direct consequence of this rotation regarding time?

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