1. Which one of the following elements is most abundant in the earth's crust? [NDA 2005]

2. In the earliest days when life originated on earth - the atmosphere contained : [UDC 1993]

3. On the 21st June - the day light is seen at the North Pole for:

4. Tides are complied and they vary from place to place because of: [IAS 2003]

5. How many kilometres are represented by 1° of latitude? [CDS 2011]

6. Which of the following statements regarding the earth's axis are true? 1. It makes an angle of with the plane of ecliptic 2. It maintains a flexible orientation with respect to the stars 3. It is the most important fact connected with Earth-Sun relationship

7. The distance between the earth and the sun is smallest in the month of:

8. Assume that the moon takes exactly 30 days to complete the cycle and also assume that it rises in the east exactly at 6.48 p.m. - on the first day. On the fourth day - at what time will it rise? [IAS 2002]

9. Insolation heats up the land masses more quickly than the water bodies because:

10. One degree of longitude on the equator is equal to a distance of:

11. The antipodal position of a place located at 35° south and 80° west is [Asstt Commdt 2010]

12. Sea tides show variations because of:

13. Antipodes are:

14. The Sun shines vertically on the equator:

15. Maximum difference in the spacing of longitudes is :

16. The revelations of a satellite photograph of the earth are as follows: 1. the Southern hemisphere bulges slightly more than the Northern hemisphere 2. it is slightly pear shaped ellipsoid of rotation 3. the polar axis of the earth is slightly shorter than the equatorial axis 4. the equatorial circumference is about 40 - 000km Which of the above statements are correct ?

17. Lunar eclipse does not occur every month because:

18. The position of the earth in its orbit - when it is at its greatest distance from the Sun causing summer in the Northern hemisphere is :

19. Consider the following statements: 1. The tropical year is shorter than the sidereal year. 2. The solar day is longer than the sidereal day. Which of the statements given above is/are correct? [NDA 2010]

20. Heat received by earth from the Sun is known as:

21. Match the following: [IAS 2009] Discontinuity Layer of Earth's interior associated with discontinuity A. Weichert - Gutenberg discontinuity 1. Outer core and inner core B. Mohorovicic (Moho) discontinuity 2. Lower mantle and outer core C Lehman discontinuity 3. Upper mantle and lower mantle D. Conrad discontinuity 4. Lower crust and upper mantle 5. Division of Sial and Sima within the crust A B C D

22. The earth's annual circuit round the sun covers a distance of:

23. If the earth's direction of rotation is reversed - what would be the IST when it is noon at the International Date Line? [IAS 1997]

24. Which one of the following is the correct sequence of the given Continents in the decreasing order of their percentage of Earth's land? [IAS 2005]

25. The longest circle which can be drawn on the earth's surface passes through: [Asstt Grade 1993]