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 evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

The difference between the equatorial diameter and polar diameter ofthe Earth is about

  1. 43km

  2. 82km

  3. 56km

  4. 101km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Equitorial diameter of the earth is about $12756$ km and The polar diameter of earth is $12713.6$km

Difference $=(12756-12713.6)$km
Around $43$km $($options$)$

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Which part of the atmosphere is called homosphere?

  1. Atmosphere up to 70 km from the surface of the earth

  2. Atmosphere up to 80 km from the surface of the earth

  3. Atmosphere up to 90 km from the surface of the earth

  4. Atmosphere up to 110 km from the surface of the earth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
 Atmosphere up to 90 km from the surface of the earth
Homosphere can be defined as the lowest part of the Earth’s atmosphere. It lies between the heterosphere and the surface of the earth. It is the earth’s atmosphere below the altitude of roughly 80 kms where there is an almost-homogenous composition of nitrogen (78%), oxygen (21%), argon (10%), carbon dioxide as well as traces of constituents like dust particles, aerosols and cloud droplets.

Description: The Earth’s atmosphere has two major zones or segments – homosphere and heterosphere. The homosphere is the lower segment of the two-part division of atmosphere and further consists of three regions namely troposphere, stratosphere and mesosphere. All the three regions have the same composition of air. However, the concentration of air keeps decreasing significantly as the altitude increases. 
Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

The thermosphere begins at a height of _____________.

  1. 80 Km

  2. 95 Km

  3. 105 Km

  4. 120 Km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The thermosphere begins at about 80 km (50 mi) above sea level. At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass (see turbosphere).

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

The height of mesosphere extends from ____________.

  1. 70 to 80 km

  2. 110 to 130 km

  3. 80 to 85 km

  4. 95 to 105 km
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Height of mesosphere layer is 80-85 kms. It is the layer present between stratosphere and thermosphere. In the mesosphere, temperature decreases as the altitude increases. The upper boundary of the mesosphere is the mesopause, which is the coldest naturally occurring place on Earth.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Troposphere extends from surface of earth to _________.

  1. 25 km

  2. 19 km

  3. 12 km

  4. 20 km
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Troposphere is the lower most layer of the earth. It extends from earth’s surface and goes up to a height of 12 km. But its height varies from place to place and from season to season. Almost all weather phenomenon occur in this layer. Air is warmest at the bottom of the troposphere near ground level. But there is a decrease of temperature with increasing height.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The space above the mercury in a simple barometer is called 

  1. Torcelian vacuum

  2. Newton's vacuum

  3. Archimede's vacuum

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Torricellian vacuum
The vacuum formed when a long tube, closed at one end and filled with mercury, is inverted into a mercury reservoir so that the open end of the tube is below the surface of the mercury. The pressure inside the Torricellian vacuum is the vapour pressure of mercury, about 103 torr.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The vertical height of mercury which a simple barometer can support at sea level is 

  1. $76 cm$
  2. more than $76cm$
  3. less than $76 cm$

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer is C.

The mercury level in the tube of the barometer falls until it is about $76 cm (760 mm)$ vertically above the mercury level. It is the atmospheric pressure acting on the surface of the mercury in the trough that supports the vertical mercury column.
The atmospheric pressure is therefore specified by so many millimetres of mercury. For example, the atmospheric pressure is $760 mm$ Hg at sea level.
Hence, The vertical height of mercury which a simple barometer can support at sea level is less than 76 cm. 

Multiple choice geography population density and distribution population and migration population : size, density, growth and structure population : distribution, density and growth

The greatest proportion of salt is found in two areas included _______________.

  1. Tropics of Cancer and Capricorn

  2. North and South Poles

  3. Equator

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The greatest proportion of salt is found in two areas of Tropic of Cancer and Tropic of Capricorn. These areas receive the maximum sunlight and hence maximum evaporation happen in these areas. 

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

Moss-Lichen community is found in the latitude range of _____________.

  1. $40$ to $60$ degrees
  2. $60$ to $80$ degrees
  3. $20$ to $40$ degrees
  4. $0$ to $20$ degrees
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

Which latitude belt best describes the middle latitudes?

  1. $20^{o} \,to \,80^{o}$
  2. $10^{o} \,to \,35^{o}$
  3. $20^{o} \,to \,35^{o}$
  4. $30^{c}irs \,to \,35^{c}irs$
Reveal answer Fill a bubble to check yourself
D Correct answer
Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

At middle latitudes, the base of an altostratus or altocumulus cloud would generally be found between:

  1. 200 and 6, 500 feet

  2. 6, 500 and 23, 000 feet

  3. 23, 000 and 43, 000 feet

  4. Above 43, 000 feet
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Altostratus and altocumulus clouds are mid-level clouds, which are typically found at altitudes between 6,500 and 23,000 feet.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

Latitude range with maximum species diversity is 

  1. $23.5^0 N -66.5 ^0 N $
  2. $23.5^0 S -66.5 ^0 S $
  3. $23.5^0 N -23.5 ^0 S $
  4. $66.5^0 N -66.5 ^0 S $
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Latitudinal gradients of biodiversity are biogeographic patterns that quantify the ways in which taxonomic, phylogenetic, functional, genetic, or phenetic biodiversity change with the latitudinal position on the surface of the earth.
  • Species richness, or biodiversity, increases from the poles to the tropics. So the latitude range with maximum species diversity is the equator region, which is option C.
Multiple choice uniform magnetic field lines of earth magnetism physics

The absolute value of earths magnetic horizontal intensity is determined with the help of

  1. DMM only

  2. VMM only

  3. DMM & VMM

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

The absolute value of earths magnetic horizontal intensity is determined with the help of DMM and VMM.