Question

Given below are two statements, one is labelled as Assertion (A) and the other one labelled as Reason (R). 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.
In light of the above statements, choose the correct answer from the options given below.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.
• E. Both (A) and (R) are false.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests the conceptual understanding of tidal phenomena and their underlying physical causes through an Assertion-Reason format.
Step 2: Detailed Explanation:

Evaluation of Assertion (A): Tides are indeed defined as the periodic 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. The periodicity is a defining characteristic of tides. Therefore, Assertion (A) is true.

Evaluation of Reason (R): The primary physical mechanism responsible for the creation of tides is the gravitational pull of celestial bodies, primarily the Moon (due to its proximity) and the Sun. This gravitational attraction creates "bulges" in the Earth's oceans. Therefore, Reason (R) is true.

Establishing the Link: The regular rise and fall mentioned in the assertion is a direct consequence of the gravitational mechanics described in the reason. Thus, Reason (R) correctly explains why Assertion (A) occurs.

Step 3: Final Answer:
Both statements are scientifically accurate, and the reason provides the fundamental cause for the assertion.