Motions Of The Earth:Class 6 Geography NCERT Chapter 3

Key Features of NCERT Material for Class 6 Geography Chapter 3 – Motions of the Earth

In previous chapter 2: Globe Latitudes and Longitudes, we have learned globes, equator, Longitudes, parallels of longitude, Latitude and parallel of Latitudes.In this Chapter 3:Motions of the earth we will study about earth’s rotation and revolution.

Quick revision notes

Rotation 

Rotation is the development of the Earth, on its pivot. 

  • The pivot of the Earth, which is a nonexistent line, makes a point of 66/2° with its orbital plane. 
  • The bit confronting the Sun encounters day, while the other half away from the Sun encounters night. 
  • The circle that separates the day from night on the globe is known as the hover of enlightenment. 
  • The Earth takes around 24 hrs to finish one rotation around its hub, it is known as earthday. 

Revolution 

  • The development of the Earth around the Sun in a fixed way or circle is called revolution. 
  • Earth takes 365)4 days to rotate around the Sun. 
  • Each fourth year, February is of 29 days rather than 28 days. Such a year with 366 days is known as a jump year. 
  • Earth is circumventing the Sun in a circular circle. 
  • Seasons change because of progress in the situation of the Earth around the Sun. 
  • Summer solstice is the situation of the Earth when the Northern Hemisphere has the longest day and the briefest night. It happens on 21st June. 
  • In the Southern Hemisphere, it is winter season as of now. The days are short and the evenings are long. 
  • Winter Solstice is the situation of the earth when Southern Hemisphere has long days and shorter evenings. In the Northern Side of the equator, the days are short and the evenings are long. It happens on 22nd December. 
  • On 21st March and September 23rd, direct beams of the sun fall on the equator and the entire earth encounters equivalent days furthermore, equivalent evenings. This is called an equinox. 

The earth has two kinds of movements—rotation and revolution. 

pasted-image-0-3-6

Rotation is the development of the earth on its pivot. In revolution the earth moves around the sun in a fixed way or circle. 

The pivot of the earth is a nonexistent line. 

The earth gets light from the sun. As the state of the earth is circular, just 50% of it gets light from the sun at once. The other half stays dim. Thusly day and night are caused. 

The earth finishes one rotation around its hub in around 24 hours. This rotation is the every day movement of the earth. 

The earth takes 365 1/4 days or one year to finish one revolution around the sun. 

There are four seasons in a year—summer, winter, spring and pre-winter. Seasons change because of the adjustment in the situation of the earth around the sun. 

The beams of sun fall legitimately on the Tropic of Cancer. Subsequently, these territories are hot. 

  • The regions close to the posts get less warmth as the beams of the sun are inclining. 

In the Northern Hemisphere the longest day and the briefest night happen on 21st June. In the Southern Hemisphere the briefest day and the longest night happen on this day. This situation of the earth is known as the mid year solstice. 

When there is summer in the Northern Hemisphere, Southern Hemisphere appreciates winter season and the other way around. 

In the Northern Hemisphere the briefest day and the longest night happen on 22nd December. In the Southern Hemisphere the longest day and the briefest night happen on this day. This situation of the earth is known as the winter solstice. 

On 21st March and September 23rd the entire earth encounters equal’days and equivalent evenings. This is wonder is known as equinox

On 23rd September, it is harvest time in the Northern Hemisphere and spring in the Sourthern Hemisphere. 

On 21st March, it is spring in the Northern Hemisphere and harvest time in the Sourthern Hemisphere. 

Days and evenings happen because of rotation while changes in seasons happen because of revolution. 

Rotation: The development of the earth on its hub is known as rotation. 

Revolution: The development of the earth around the sun in a fixed way or circle is known as revolution. 

Orbital plane: The plane shaped by the circle is known as the orbital plane. 

Hover of brightening: The circle that isolates the day from night on the globe is known as the hover of enlightenment. 

Jump year: The year where February is of 29 days rather than 28 days is known as a jump year. 

Summer solstice: In the Northern Hemisphere the longest day and the most brief night happen on 21st June. In the Southern Hemisphere, the most limited day and the longest night happen on this day. This situation of the earth is called summer solstice. 

Winter solstice: In the Northern Hemisphere the most brief day and the longest night happen on 22nd December. In the Southern Hemisphere, the longest day and the most limited night happen on this day. This situation of the earth is called winter solstice. 

Equinox: On 21st March and September 23rd the whole earth encounters equivalent days and equivalent evenings. This is known as the equinox.

top
REEII ©  All rights reserved.