(Source: VI NCERT Geography chapter 3 & 4)
Chapter 3 Motions of the Earth
- Rotation is the movement of the earth on its axis.
- The period of rotation of earth is known as the Earth day.
- It takes 365 days 6 hours to revolve around the sun.
- Earth goes in an elliptical orbit around the sun.
- On 21 june, the Northern Hemisphere is tilted towards the sun. The rays of the sun fall directly on the tropic of cancer. This position of the earth is called Summer Solstice.
- On 22 December the tropic of capricorn receives direct rays of the sun. This is called Winter Solstice.
- On 21st March and 23rd september direct rays of the sun fall on the equator. This is known as Equinox.
- On 23rd September it is autumn season in the Northern Hemisphere and spring season in the southern hemisphere.
Chapter 4 Maps
- The three components of maps are Distance, Direction and Symbol
- Directions (North, South, East and West) are called Cardinal Points.