Multiple Choice Questions on Consider the following 1 Electromagnetic radiation 2 Geothermal energy 3 Gravitational force 4........... for CDS Exam Preparation

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     Consider the following :

    1. Electromagnetic radiation

    2. Geothermal energy

    3. Gravitational force

    4. Plate movements

    5. Rotation of the earth

    6. Revolution of the earth

    Which of the above are responsible for bringing dynamic changes on the surface of the earth ?

    1, 2, 3 and 4 only
     
    Incorrect Answer

    1, 3, 5 and 6 only
     

    Incorrect Answer

    2, 4, 5 and 6 only
           

    Incorrect Answer

     1, 2, 3, 4, 5 and 6

    Correct Answer
    Explanation:
    • Electromagnetic Radiation:
      • Radiation has both electric and magnetic fields and travels in waves. Electromagnetic radiation can vary in strength from low energy to high energy. It includes radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays. Also called EMR.
      • Electromagnetic radiation causes temperature change, Evaporation of water results in Precipitation, Formation of Metamorphic Rocks. It means Electromagnetic radiations bring dynamic changes to the surface of Earth. Hence 1 is Correct.
    • ??Geothermal Energy:
      • ?The energy emanating from within the earth is the main force behind endogenic geomorphic processes.
      • This energy is mostly generated by radioactivity, rotational and tidal friction and primordial heat from the origin of the earth.
      • This energy due to geothermal gradients and heat flow from within induces diastrophism and volcanism in the lithosphere.
      • Due to variations in geothermal gradients and heat flow from within, crustal thickness and strength, the action of endogenic forces are not uniform and hence the tectonically
        controlled original crustal surface is uneven. Hence 2 is Correct.
    • ?Gravitational Force:
      • ?Gravity besides being a directional force activating all downslope movements of matter also causes stresses on the earth’s materials.
      • eg. Mass movement, Avalanche. Hence 3 is Correct.
    • ??Plate Movements:
      • ?Plate movement results in continent building, Earthquake. Hence 4 is Correct.
    • ?Rotation of the Earth:
      • ?Rotation of earth about the axis results in the uneven heating of earth surface causes Pressure difference and forms the Winds.
      • Winds are associated with a phenomenon like Rainfall, Heat budget, Ocean currents etc. Hence statement 5  is Correct.
    • ?Revolution of the Earth:
      • ?Earth rotates around the sun in an elliptical manner. When the distance between the sun and Earth is Highest is called Aphelion and when the distance is smallest then is called Perihelion, which creates the difference in the intensity of sunlight that reaches Earth.
      • Earth is bound by the Gravitational force of the sun causing the Tides in the ocean. Hence 6 is Correct.

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