WBBSE Class 6 Geography Chapter 3 Where You Are Notes
1. A globe is a sphere-shaped small model of the Earth.
2. The imaginary line that connects the two poles of the Earth through its centre is called the Earth’s axis. The length of this axis is 12,714 km.
3. The northern limit and southern limit of the axis of the Earth are known as the North Pole and the South Pole respectively.
4. The imaginary circular line lying equidistant from the poles and running along the surface of the Earth around its centre in an east-west direction is called the Equator.
5. The northern half of the Earth from the Equator is the northern hemisphere.
6. The southern half of the Earth from; the Equator is the southern hemisphere.
Read and Learn More WBBSE Class 6 Geography Notes
7. The angular distance of a place—north or south from the Equator, measured in degrees from the centre of the Earth, is known as latitude.
8. The imaginary circular lines parallel to the Equator and each other running in an east-west direction are known as parallels of latitude.
9. The parallel of latitude to the north of the Equator with an angular value of 23y2°N is known as the Tropic of Cancer.
10. The parallel of latitude to the north of the Equator with an angular value of 66%°N is known as the Arctic Circle.
11. The 90°N polar point in the northern hemisphere is called the North Pole.
12. The parallel of latitude in the southern hemisphere with an angular value of 231/2°S is called the Tropic of Capricorn.
13. The parallel of latitude in the southern hemisphere with an angular value of 66V4°S is known as the Antarctic Circle.
14. The 90°S polar point in the southern hemisphere is known as the South Pole.
15. The plane containing the Equator which divides the Earth into two equal halves is called the Equatorial plane.
WBBSE Class 6 Parallels of Latitude Notes
16. The elliptical path on which the Earth revolves around the Sun is known as the Earth’s orbit.
17. The plane on which the Earth constantly revolves around the Sun in its own orbit is called the orbital plane.
18. The angular distance of a place, east or west from the Prime Meridian, measured in degrees from the centre of the Earth is known as longitude.
19. The imaginary semi-circular lines connecting the two poles and running in a north-south direction are known as the meridians of longitude.
20. The meridian of longitude passing through the Royal Observatory at Greenwich having an angular value of 0° is known as the Prime Meridian.
21. The diametrically opposite meridian to the Prime Meridian common to both east longitude and west longitude, is known as the 180° meridian. The International Date Line mostly follows this meridian.
22. The Prime Meridian and 180° meridian jointly divide the Earth into two halves. The one located in the east is known as the eastern hemisphere, while the one located in the west is called the western hemisphere.
23. A Great Circle is any circle that is drawn on the Earth’s surface, sharing the same centre as that of the Earth itself. The Equator is a Great Circle.