class 6 motions of earth
Grade 6, Social Studies
Check out in detail about the Rotation and Revolution, Equinox, Solsitice
1. Nicolaus Copernicus proposed that Earth spin on its Own axis every day and night and revolves around the Sun in a year.
2. Movement of Earth on its own axis is called as Rotation
3. Movement of Earth around the Sun is called as Revolution
4. Earth spin on its own axis from East to West
5. Axis of the Earth is inclined at an angle of 23 ½ degree
6. From the plane of Earth, axis is inclined at an angle of 66 ½ degree
7. Tilt of Earth axis is also called as Inclination
8. Inclination of axis causes
- Unequal duration of day and night at different places
- It causes difference in temperature between different regions of Earth
- It causes changes in season
9. Earth takes 24 hours to complete one rotation
10. One rotation is One Earth day
11. Rotation of Earth causes day and night
12. Earth rotates around the Sun from West to East, so we see Sun and other heavenly bodies arising from East
13. Rotation of Earth creates equatorial bulge at equator and flattening of Earth near poles
14. Imaginary line that divides part of Earth which has day and other half as night is called as Circle of illumination
15. Entire period between night and day is called as Dawn
16. Entire period between day and night is called as Dusk
17. Earth moves around the Sun in an Elliptical Orbit
18. One Revolution is Completed in 365 days 48 minutes and 45 seconds
19. Remaining six hours are added and we get additional day every four years
20. Extra day is added to the month of February, and it is called as Leap year
21. Seasonal changes are direct effect of revolution
22. Near the poles the Sun does not set for 6 months. Regions around the poles are called as Land of Midnight Sun
23. Solstices in latin “Sol” means Sun and “sistere” means to stand still
24. During Solstice Earth is at at maximum distance from Sun
25. In Northern Hemisphere
- Summer Solstice — June 20/June 21
- Winter Solstice — Dec 21/ Dec 22
26. In Southern Hemisphere
- Summer Solstice — Dec 21 /Dec 22
- Winter Solstice — June 20/ June 21
27. During Summer solstice, Sun rays fall directly on Tropic of cancer
28. During Winter solstice sun rays fall directly on Tropic of Capricorn
29. When sun shines directly above equator, we get Equinox
30. Equinox means Equal day and night that is length of day and night is equal
31. Vernal equinox occurs on March 21st , it is the beginning of Spring in the Northern Hemisphere
32. Autumnal Equinox occurs on 23rd Sep, it marks the beginning of autumn season
33. In Australia Christmas is celebrated in Summer
