Which of the following is the cause for the earth's seasons?
| A. | Vari,ation in the amount of ene'rgy' given off .by thesun' |
| B. | Its elliptical orbit and varying speed of rotation |
| C. | Inclination of its' axis of rotation to the plane of,orbit, |
| D. | Its greater' distance, from the Sun during winter than during Summer |
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Option: C Explanation : Click on Discuss to view users comments. |
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:
| A. | Perihelion |
| B. | Aphelion |
| C. | Perigee |
| D. | Apogee |
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Option: B Explanation : Click on Discuss to view users comments. |
The time required for moonlight to reach earth
| A. | 3.6 sec |
| B. | 2 sec |
| C. | 1.3 sec |
| D. | 1 sec |
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Option: C Explanation : Click on Discuss to view users comments. |
Only one side of the moon is ever seen from the earth because
| A. | the moon is at perigee |
| B. | the moon does not rotate |
| C. | only one side reflects light |
| D. | the periods of rotation and revolution of the moon are equal |
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Option: D Explanation : Click on Discuss to view users comments. |
