Days and nights are equal throughout the globe when Sun is above
| A. | Poles |
| B. | Tropic of Cancer |
| C. | Equator |
| D. | Tropic of Capricorn |
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Option: C Explanation : Click on Discuss to view users comments. |
The mean distance between the distances on perihelion and aphelion (in millwn'km.) is
| A. | 111 km |
| B. | 149.5km |
| C. | 159 km |
| D. | 168.5km |
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Option: B Explanation : Click on Discuss to view users comments. |
The crust forms what percentage of the volume of the earth?
| A. | 0.5% |
| B. | 2.5% |
| C. | 7.5% |
| D. | 12.5% |
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Option: A Explanation : Click on Discuss to view users comments. |
Variation in duration of day and night is due to
1. rotation of earth on its axis
2. revolution of earth round the sun
3. inclination of earth atan angle of 66 1/2
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1,2 and 3 |
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Option: B Explanation : Click on Discuss to view users comments. |
The moon is called a satellite of the earth because
| A. | it is much 'smaller than the earth |
| B. | it revolves round the earth |
| C. | it draws light froth the sun via the earth |
| D. | it remains in position due to the gravitational pull of the earth. |
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Option: B Explanation : Click on Discuss to view users comments. |
