Assertion (A) : Tides indicate the regular and periodic rise and fall in sea level.Reason (R) : Tides are caused by the gravitational pull of the moon and the sun.
Question
Assertion (A) : Tides indicate the regular and periodic rise and fall in sea level.Reason (R) : Tides are caused by the gravitational pull of the moon and the sun.
Solution
Both Assertion (A) and Reason (R) are correct. Tides are indeed the regular and periodic rise and fall in sea level. This is caused by the gravitational pull of the moon and the sun on the Earth's oceans. The gravitational pull causes the water to bulge out on the side of the Earth closest to the moon, creating a high tide. On the opposite side of the Earth, another high tide occurs, due to the inertia of the water. In between these high tides, the water level drops, creating low tides. This cycle repeats approximately every 12 hours.
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