Statement I: Sideral day is shorter than Solar day. Statement II: The motion of the Earth in its orbit around the Sun is termed as revolution.

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Q: 3 (CDS-I/2015)
Statement I: Sideral day is shorter than Solar day. Statement II: The motion of the Earth in its orbit around the Sun is termed as revolution.

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,42,31,17,42,9,5

keywords: 

{'solar day': [0, 0, 1, 1], 'sideral day': [0, 0, 0, 1], 'sun': [3, 0, 0, 6], 'orbit': [0, 0, 1, 1], 'motion': [0, 0, 0, 3], 'earth': [0, 1, 1, 1]}

Option 1 states that both statements are true and that Statement II is the correct explanation of Statement I.

Statement I: Sideral day is shorter than Solar day.

Statement II: The motion of the Earth in its orbit around the Sun is termed as revolution.

Let`s evaluate each statement individually:

Statement I is true. A sidereal day is the time it takes for the Earth to complete one rotation on its axis relative to the stars. It is about 23 hours, 56 minutes, and 4 seconds in length. On the other hand, a solar day is the time it takes for the Earth to complete one rotation relative to the Sun. It is about 24 hours in length. Therefore, the sidereal day is shorter than the solar day.

Statement II is also true. The motion of the Earth in its orbit around the Sun is indeed termed as revolution. The Earth takes approximately 365.25 days to complete one orbit around the Sun. This revolution is responsible for the changing seasons and the length of the solar day.

However, the statements are not causally connected, and Statement II does not provide an explanation for Statement I. Therefore, option 1 is incorrect. The correct answer is option 2, which states that both statements are true