EARTH AS A PLANET
Q1. What is Earth?
A planet, orbiting the Sun.
Q2. What is the position of Earth in the planetary order from the Sun?
Third.
Q3. By mass, what is the position of Earth?
Fifth largest.
Q4. What is the shape of the Earth?
Oblate Spheroid.
Q5. Who first suggested the shape of the Earth?
Ferdinand Magellan, the first and famous navigator of Portug His life period was 1480-1521.
Q6. What is the diameter of Earth at the Equator?
12755 Kms.
Q7. What is the diameter of Earth at the Poles?
12712 Kms.
Q8. What is the mean dia of the Earth?
12734 Kms.
Q9. What is the circumference of Earth at the Equator?
40,075 Kms.
Q10. What is the circumference of Earth at the Poles?
40024 Kms.
Q11. What is the Equatorial radius of Earth?
6377 Kms.
Q12. What is the total surface area of the Earth?
510,100,500 SQKM. (51,01,00,500)
Q13. What is the total mass of Earth?
5880 X 10x21
Q14. What is the total volume of Earth?
1083208840000 Cubic Km.
Q15. What is the mean distance of the Earth from Sun?
149407000 Kms.
Q16. How much time does earth take to rotate on it's own axis?
23 Hrs 56 mts and 40.09 Secs.
Q17. What is Side Real Day?
Earth rotates East to West daily. The time taken for such rotation on a daily basis is called so.
Q18. How much time does the Earth take to complete one revolution around the Sun?
365 Days 5 Hrs 48 mts and 45.5 Secs. It is called SOLAR YEAR.
Q19. What is the highest point on Earth?
Mount Everest - 8848 mts above sea level.
Q20. What is the lowest point on Earth?
Israel - Jordan shores. 396 mtrs below sea level. Also known as "Shores Of Dead Sea".
Q21. How many degrees does the Earth rotate in one hour?
15 degree.
Q22. What is the chemical and metal composition of Earth?
| Only the substantial quantities are given below: |
| 1. Oxygen |
46.5% |
| 2. Silicon |
27.72% |
| 3. Aluminium |
8.13% |
| 4. Iron |
5.1% |
| 5. Calcium |
3.63% |
| 6. Sodium |
2.85% |
| 7. Potassium |
2.62% |
| 8. Magnesium |
2.09% |
Q23. What is the most gaseous chemical element available on earth?
Oxygen 46.5%
Q24. Which is the largest chemical element available on earth?
Silicon 27.72%
Q25. Which metal is most available on earth?
Aluminium 8.13%
Q26. How much Calcium is available on earth?
3.63%
Q27. What is the percentage of Iron composed of on Earth?
5.1%
Q28. What is the percentage of Sodium on Earth?
2.85%
Q29. How much of Earth is covered by Potassium?
2.62%
Q30. How much of Magnesium is available on Earth?
2.09%
Q31. What is "Axis" of the Earth?
An imaginary line that passes through the Earth from North to South at the center.
Q32. What is the angle of inclination of Earth?
Remains inclined at an angle of 66.5(degree) to the plane of the Earth's orbit.
Q33. What are the effects of the rotation of Earth?
1. Occurrence of Day and Nights.
2. Change in direction of wind and ocean currents.
3. Position of a place in Earth can be fixed or defined.
Q34. Around which celestial body the Earth revolves and what is the shape of its orbit?
Around the Sun, in an elliptical path, simultaneously rotating on its own axis.
Q35. What is a Solar Year?
The time taken by the Earth to complete one revolution around the Sun is called so.
Q36. How much time does Earth take to complete one revolution around Sun?
365 Days, 48 Mts and 45.51 Secs.
Q37. What is the effect of Earth's revolution?
Change of Seasons.
Q38. What is the total land area of Earth?
148950500 SQKM - One third of Earth's total surface area.
Q39. What is the total water area of the Earth?
361149700 SQKM representing two third of Earth's total surface area.
Q40. Earth's external heat Engine is driven by what energy?
Sun.
Q41. The most voluminous portion of the Earth is known to the Geologists as?
Mantle.
Q42. What is Circumnavigation?
Sailing around the Earth.
Q43. Who was the first to circumnavigate the Earth?
Ferdinand Magellan.
Q44. What is Erosion?
The process by which all land is continuously worn away by natural agents like river, rain, frost, wind etc.,
Q45. What are Fossils?
The remains of a plant or animal or any living organism , which have been buried and preserved over a long period in the rocks of the earth's crust. Fossilisation is usually confined to skeletons or hard parts of animals.
Q46. What is Hinterland?
A commercially linked area behind a sea port which supplies and distributesthe bulk of exports and imports.
Q47. What is Horizon?
The boundary of the Earth from any point of land, the line, where the Earth, Sea or Sky seem to meet.
Q48. What is Peat?
A dark brown or black organic mass found in wet marshy ground, consisting of rotten vegetation. Used as
fuel in some places.
Q49. What is Terrain?
The physical characteristics and features of any stretch of the country.
Q50. What is Twilight?
The faint light over the sky after sunset or before sunrise.
Q51. What is Continental Shelf?
The shallow area of the sea surrounding a land mass - maximum of 600 feet or 100 fathoms.
Q52. What is a Continental Slope?
A Continental shelf extending into the sea, descending a depth of 2000 fathom or 12000 feet.
Q53. What is Littoral?
The land adjacent to the coast of a country. The littoral region of the ocean comprises the shallow waters
adjacent to the coast and littoral countries are those that lie along the sea coast.
