NCERT Class 6 Geography Chapter 3: Motions of the Earth YouTube Lecture Handout

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Watch Video Lecture on YouTube: NCERT Class 6 Geography Chapter 3: Motions of the Earth

NCERT Class 6 Geography Chapter 3: Motions of the Earth

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Rotation

  • Movement of earth on its axis – 24 hours – Earthday

Rotation of the Earth

Rotation of the Earth

Revolution

  • Movement of earth around sun in fixed path: 365 ¼ days

  • Extra 6 hours added for 4 years – 1 day extra – leap year

Revolution of the Earth

Revolution of the Earth

Orbital Plane

  • Plane formed by the orbit

  • Axis of earth makes 66 ½ degree with orbital plane

Orbital Plane of the Earth

Orbital Plane of the Earth

Circle of Illumination – Does Not Coincide with Axis

Circle of Illumination – Does not coincide with axis

Circle of Illumination Image-1

What Would Happen if Earth Does Not Rotate?

Circle of Illumination Image-2

Circle of Illumination Image-2

Axial Precession – 26,000 Years – Changes North Star (Polaris to Vegas)

Axial Precession Image-1

Axial Precession Image-1

Axial Precession Image-2

Axial Precession Image-2

Perihelion Precession

Perihelion Precession Image

Perihelion Precession Image

Solstice and Equinox

Solstice and Equinox Image

Solstice and Equinox Image

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