Geography
Assertion (A): In the course of the earth's movement around the sun, the North Pole remains inclined towards the sun for a part of the year while the South Pole is tilted away from it.
Reason (R): The earth rotates on an inclined axis in an elliptical path around the sun.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Rotation & Revolution
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — The earth rotates on an inclined axis in an elliptical path around the sun. The earth's axis is inclined at an angle of 23.5° from the perpendicular to this plane of the elliptic. As a result of this, in the course of the earth's movement around the sun, the North Pole remains inclined towards the sun for a part of the year while the South Pole is tilted away from it. For the remaining part of the year, the situation is reversed.
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Related Questions
Which of the following is true about the revolution of the earth around the sun?
- It results in the cycle of seasons
- The direction of motion is the same as rotation
- The speed is not uniform
- All of the above.
Assertion (A): A bulge in the middle portion of the earth and flattened top at the poles.
Reason (R): Centrifugal force always directed outward, i.e., away from the axis of rotation.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Which of the following is true about the perihelion position of the earth?
- It is farthest from the sun.
- It occurs on 3 January.
- The speed of revolution is the least.
- All of the above.
The lighted part of the earth is called the :
- Circle of Light
- Circle of Illumination
- Circle of Solstice
- Circle of Equinox