Geography ยท Physics

Geodesy and Celestial Mechanics

1,049 Questions

Geodesy and celestial mechanics questions explore Earth measurements, great circles, and planetary motions. These concepts form a crucial part of physical geography and astronomy in competitive exams. Practice these questions to grasp longitudinal and latitudinal calculations.

Longitude and latitude calculationsGreat circle conceptEarths axial precessionLagrangian pointsAtmosphere boundary

Geodesy and Celestial Mechanics Questions

Multiple choice

What is the term used to describe the position of a celestial body in relation to the Earth's axis?

  1. Declination

  2. Right Ascension

  3. Latitude

  4. Longitude
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Declination is the angular distance of a celestial body north or south of the celestial equator. It is measured in degrees, minutes, and seconds.

Multiple choice

What is the term used to describe the position of a celestial body in relation to the Earth's equator?

  1. Right Ascension

  2. Declination

  3. Latitude

  4. Longitude
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Right Ascension is the angular distance of a celestial body east of the vernal equinox. It is measured in hours, minutes, and seconds.

Multiple choice

What is the term used to describe the position of a celestial body in relation to the Earth's surface?

  1. Latitude

  2. Longitude

  3. Altitude

  4. Azimuth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Latitude is the angular distance of a celestial body north or south of the Earth's equator. It is measured in degrees, minutes, and seconds.

Multiple choice

What is the term used to describe the position of a celestial body in relation to the Earth's horizon?

  1. Altitude

  2. Azimuth

  3. Latitude

  4. Longitude
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Altitude is the angular distance of a celestial body above the horizon. It is measured in degrees, minutes, and seconds.

Multiple choice

What is the term used to describe the position of a celestial body in relation to the Earth's prime meridian?

  1. Longitude

  2. Latitude

  3. Altitude

  4. Azimuth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Longitude is the angular distance of a celestial body east or west of the Earth's prime meridian. It is measured in degrees, minutes, and seconds.

Multiple choice

What is the term used to describe the movement of the Earth's axis?

  1. Precession

  2. Nutation

  3. Revolution

  4. Rotation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Precession is the movement of the Earth's axis. It is caused by the gravitational pull of the Sun and the Moon.

Multiple choice

How did the Polynesians use the concept of zero in their navigational system?

  1. To mark their positions on a map

  2. To calculate the distance between two islands

  3. To determine the direction of the wind

  4. To predict the weather
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Polynesians used the concept of zero to mark their positions on a map. They would place a marae at the center of their map, and then they would use other marae to mark the positions of islands and other landmarks.

Multiple choice

How did the Polynesians use the concept of the square root in their navigation?

  1. They used it to calculate the distance between two islands

  2. They used it to determine the direction of the stars

  3. They used it to predict the weather

  4. They used it to measure the height of waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Polynesians used the concept of the square root to calculate the distance between two islands. They would use the Pythagorean theorem to calculate the square root of the sum of the squares of the distances between the two islands.

Multiple choice

Which standard defines the coordinate system and datum used for geospatial data in India?

  1. IS 14900:2017

  2. IS 15680:2017

  3. IS 17269:2017

  4. IS 18931:2017
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IS 14900:2017 defines the coordinate system and datum used for geospatial data in India.

Multiple choice

What is the horizontal datum used for geospatial data in India?

  1. World Geodetic System 1984 (WGS84)

  2. Indian Geodetic Datum 1960 (IGD60)

  3. Everest 1830 (E1830)

  4. Modified Everest 1830 (ME1830)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The horizontal datum used for geospatial data in India is Indian Geodetic Datum 1960 (IGD60).

Multiple choice

What is the approximate thickness of the Earth's crust?

  1. 10-20 km

  2. 30-40 km

  3. 50-60 km

  4. 70-80 km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Earth's crust is relatively thin, ranging from 10 to 20 kilometers in thickness.

Multiple choice

What is the approximate thickness of the Earth's mantle?

  1. 2,900-3,000 km

  2. 2,700-2,800 km

  3. 2,500-2,600 km

  4. 2,300-2,400 km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Earth's mantle is approximately 2,900 to 3,000 kilometers thick.

Multiple choice

What is the approximate thickness of the Earth's atmosphere?

  1. 10-20 km

  2. 30-40 km

  3. 50-60 km

  4. 100-120 km
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Earth's atmosphere extends approximately 100 to 120 kilometers above the surface.

Multiple choice

What is the mathematical term for the point in an astrological chart where two planets are in signs that are 90 degrees apart?

  1. Conjunction

  2. Opposition

  3. Square

  4. Trine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The mathematical term for the point in an astrological chart where two planets are in signs that are 90 degrees apart is square.

Multiple choice

What is the mathematical term for the point in an astrological chart where two planets are in signs that are 120 degrees apart?

  1. Conjunction

  2. Opposition

  3. Square

  4. Trine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The mathematical term for the point in an astrological chart where two planets are in signs that are 120 degrees apart is trine.