Geographic Calculations and Earth's Properties
5 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

An approximate equation for calculating the convergency between two meridians is:

  • Convergency=60 x dlong x cos. lat. (correct)
  • Convergency=dlat x sin mean long
  • Convergency=dlong x sin mean lat.
  • Convergency=dlong x cos. lat.
  • Given: value for the ellipticity of the Earth is 1/297. Earths semi-major axis, as measured at the equator, equals 6378.4 km. What is the semi-minor axis (km) of the earth at the axis of the Poles?

  • 6 378.4
  • 6 399.9
  • 6 367.0
  • 6 356.9 (correct)
  • The sun's declination is on a particular day 12.00 S. Midnight sun may this day be observed:

  • South of 7800S. (correct)
  • At 7800S only.
  • North of 7800N.
  • North of 7800S.
  • The angle between the plane of the Equator and the plane of the Ecliptic is:

    <p>23.5 deg. (C)</p> Signup and view all the answers

    Consider the following statements on longitude.

    <p>Longitude is stated in degrees up to 360°. (B), The largest value of longitude is 180°. (C)</p> Signup and view all the answers

    Flashcards

    Inclination of the Ecliptic

    The angle between the plane of the Equator and the plane of the Ecliptic is 23.5 degrees.

    Convergency

    The difference in longitude between two meridians, measured along a parallel of latitude.

    Semi-minor Axis of Earth

    The semi-minor axis of the Earth, representing the distance from the center of the Earth to the surface at the poles.

    Ellipticity of Earth

    The ratio of the difference between the semi-major and semi-minor axes to the semi-major axis.

    Signup and view all the flashcards

    Midnight Sun

    The phenomenon where the sun remains above the horizon for 24 hours at a location. It occurs at locations north of the Arctic Circle in summer or south of the Antarctic Circle in winter.

    Signup and view all the flashcards

    Solar Declination

    The angle between the Sun's rays and the plane of the Equator. It varies throughout the year due to Earth's tilt.

    Signup and view all the flashcards

    Longitude

    The angular distance, measured in degrees, east or west of the prime meridian. It is a coordinate used to specify a location on Earth's surface.

    Signup and view all the flashcards

    Convergency Equation

    The approximate equation for calculating convergency: Convergency = dlong * sin(mean lat).

    Signup and view all the flashcards

    Semi-major Axis of Earth

    The semi-major axis of the Earth, representing the distance from the center of the Earth to the surface at the equator.

    Signup and view all the flashcards

    Maximum Longitude

    The maximum value of longitude is 180 degrees, both east and west of the prime meridian.

    Signup and view all the flashcards

    Maximum Change in Longitude

    The largest change in longitude that can occur between any two points on Earth is 180 degrees.

    Signup and view all the flashcards

    Range of Longitude

    The value of longitude can range from 0 to 180 degrees, with 0 degrees at the prime meridian and 180 degrees at the International Date Line.

    Signup and view all the flashcards

    Longitude Units

    The value of longitude is expressed in degrees, with 1 degree representing 1/360th of the circumference of the Earth.

    Signup and view all the flashcards

    Earth's Shape

    The Earth is an oblate spheroid, meaning it is flattened at the poles and bulging at the equator. This shape is caused by the centrifugal force of the Earth's rotation.

    Signup and view all the flashcards

    Polar Distance

    The distance between the poles and the equator is shorter than the distance along the equator.

    Signup and view all the flashcards

    Latitude and Day Length

    The latitude of a location determines the length of daylight hours, with locations closer to the poles experiencing greater variation.

    Signup and view all the flashcards

    Earth's Rotation and Revolution

    The Earth's rotation on its axis determines day and night, while the Earth's revolution around the Sun causes the seasons.

    Signup and view all the flashcards

    Longitude and Time

    A location's longitude influences its local time, with each degree of longitude representing a four-minute difference in time.

    Signup and view all the flashcards

    Earth's Magnetic Field

    The Earth's magnetic field protects us from harmful solar wind radiation, causing auroras at the magnetic poles.

    Signup and view all the flashcards

    Study Notes

    Convergence Equation

    • Convergence is calculated using different equations depending on the parameters used
    • One formula is: Convergence = 60 x dlong x cos lat
    • Another formula: Convergence = dlong x sin mean lat
    • Another formula: Convergence = dlat x sin mean long
    • Another formula: Convergence = dlong x cos lat

    Earth's Ellipticity

    • Earth's ellipticity is 1/297.
    • Semi-major axis at the equator is 6378.4 km
    • Semi-minor axis at the poles is 6356.9 km

    Sun's Declination

    • Sun's declination on a particular day at 12.00 S.
    • Midnight sun is observed at North of 7800N .

    Angle Between Equator and Ecliptic

    • Angle between the plane of the Equator and the Ecliptic is 23.5 degrees.

    Longitude

    • Longitude is measured in degrees up to 360°.
    • The largest value of longitude is 180°.
    • The largest value of change of longitude is 90°.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz explores various geographic calculations, including convergence equations, the ellipticity of Earth, and sun's declination. It also covers the angle between the Equator and the Ecliptic, alongside understanding longitude measurements. Test your knowledge on these essential topics in geography and earth sciences.

    More Like This

    Convergence and Divergence
    3 questions

    Convergence and Divergence

    AffirmativeSmokyQuartz avatar
    AffirmativeSmokyQuartz
    Convergence in the Retina
    30 questions

    Convergence in the Retina

    AccomplishedMagic avatar
    AccomplishedMagic
    Convergence and Media Influence
    5 questions
    Use Quizgecko on...
    Browser
    Browser