The exact time taken by the earth for single rotation on its own axis is
A. | 24 hrs |
B. | 24 hrs 5 secs |
C. | 23 hrs 50 minutes 7.2 secs |
D. | 23 hrs 56 minutes 4.09 secs |
Option: D Explanation : Click on Discuss to view users comments. |
Green House Effect means
A. | pollution in houses in tropical regions |
B. | trapping. of solar energy due to atmospheric oxygen |
C. | trapping of solar energy due to atmospheric carbon dioxide |
D. | Cultivation in green houses so as to check pollution. |
Option: C Explanation : Click on Discuss to view users comments. |
It is six months long day in the northern polar region and six months long night in the southern polar region because
A. | earth is revolving around the sun |
B. | earth is inclined towards its orbital plane |
C. | earth is rotating |
D. | None of these |
Option: B Explanation : Click on Discuss to view users comments. |
At a latitude of 450 the earth spins on its axis at the rate of
A. | 420 km/hr. |
B. | 745 km/hr. |
C. | 1120 km/hr. |
D. | 1542 km/hr. |
Option: C Explanation : Click on Discuss to view users comments. |
Spring tides occur when
A. | the moon is nearest to the earth |
B. | the moon is farthest from the earth |
C. | the moon the sun and the earth are at right angles to .the earth at the apex |
D. | the moon, the sun and the earth are in the same line. |
Option: D Explanation : Click on Discuss to view users comments. |