Statement I: Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the. rotation of the Earth. Statement II: Earth rotates from the West towards the East once in 24 hours

examrobotsa's picture

Submitted by examrobotsa on

Q: 2 (CDS-I/2015)
Statement I: Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the. rotation of the Earth. Statement II: Earth rotates from the West towards the East once in 24 hours with respect to the Sun.

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,49,42,30,49,6,6

keywords: 

{'tides': [2, 0, 0, 4], 'sea levels': [0, 0, 0, 2], 'moon': [2, 0, 5, 2], 'earth': [0, 1, 1, 1], 'sun': [3, 0, 0, 6], 'gravitational forces': [0, 0, 0, 5], 'rotation': [1, 0, 0, 2]}

The correct answer is option 2: Both statements are individually true, but statement II is not the correct explanation of statement I.

Statement I is true. Tides are indeed the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, along with the rotation of the Earth. The gravitational pull of the Moon causes a high tide on the side of the Earth facing the Moon and a high tide on the opposite side. The gravitational pull of the Sun also contributes to the tides, although to a lesser extent.

Statement II is also true. The Earth does rotate from the West towards the East, completing one rotation in approximately 24 hours with respect to the Sun. This rotation is what gives us the cycle of day and night.

However, statement II is not the correct explanation of statement I. The rotation of the Earth does have an impact on the tides, but it is not the main cause. The primary cause of tides is the gravitational forces exerted by the Moon and the Sun.