Geography · 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 social studies discovery of universe famous space scientists and astronauts space exploration space communications

Apogee is 

  1. The point farthest approach to earth

  2. The point farthest approach to mass

  3. The point farthest approach to moon

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A.  The point farthest approach to earth

The point in the orbit of an object (as a satellite) orbiting the earth that is at the greatest distance from the center of the earth also the point farthest from a planet or a satellite (as the moon) reached by an object orbiting it. 

Multiple choice geography discovery of universe famous space scientists and astronauts space exploration space communications continents of earth antarctica antarctica

What was the circumference of earth calculated by Aryabhatta?

  1. 24901 miles

  2. 24835 miles

  3. 22134 miles

  4. 24234 miles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
 The great Indian mathematician Aryabhata I (476–500 CE) gave an estimate of the earth’s circumference: 24,835 miles in our modern units. This remained the best measurement for over a thousand years.
Multiple choice maths square and square root scientific notation use of exponents power of 10

The average distance between the Sun and a certain planet is approximately $\displaystyle 2.3\times { 10 }^{ 14 }$ inches. Which of the following is closest to the average distance between the Sun and the planet, in kilometers? (1 kilometer is approximately $\displaystyle 3.9\times { 10 }^{ 4 }$ inches )

  1. $\displaystyle 7.1\times { 10 }^{ 8 }$
  2. $\displaystyle 5.9\times { 10 }^{ 9 }$
  3. $\displaystyle 1.6\times { 10 }^{ 10 }$
  4. $\displaystyle 1.6\times { 10 }^{ 111 }$
  5. $\displaystyle 5.9\times { 10 }^{ 11 }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The average distance in KM will be $\frac { 2.3\times { 10 }^{ 14 } }{ 3.9\times { 10 }^{ 4 } } =0.59\times { 10 }^{ 10 }=5.9\times { 10 }^{ 9 }\quad km$

So correct answer will be option B

Multiple choice geography earth as a planet spheres of earth earth and structure introduction to the spheres of the earth

The Equatorial circumference of the Earth is ________________.

  1. 40075 km

  2. 40000 km

  3. 75040 km

  4. 54070 km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The earth is not a complete sphere as it is a little flat at poles and bulges at the equator which makes its equatorial diameter greater than its polar diameter.
  • The equatorial diameter of the Earth is 40075 km.
Multiple choice geography earth as a planet spheres of earth earth and structure introduction to the spheres of the earth

Of the earth's total geographical area ___________ percent of area is covered with water.

  1. $66.6$
  2. $70.78$
  3. $29.22$
  4. $50.5$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • About 70.78% of the earth’s surface is covered with water.
  • Ninety-seven percent of the water on the earth is salt water. 
  • Salt water is filled with salt and other minerals, and humans cannot drink this water. 
  • Although the salt can be removed, it is a difficult and expensive process.
  • Two percent of the water on earth is glacier ice at the North and South Poles. 
  • This ice is fresh water and could be melted; however, it is too far away from where people live to be usable.
  • Less than 1% of all the water on earth is fresh water that we can actually use. 
  • We use this small amount of water for drinking, transportation, heating and cooling, industry, and many other purposes.

Multiple choice geography earth as a planet spheres of earth earth and structure introduction to the spheres of the earth

Earth is slightly bulge in the _______.

  1. North pole

  2. Middle

  3. South pole

  4. North and South pole
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earth bulges at the equator, which is the middle region between the poles. This bulge occurs because of Earth's rotation. The poles are flattened, not bulged. The question has grammatical errors but the answer is clear.