Question

Match the earth layers (Group I) with corresponding approximate thicknesses (Group II). 
Group I                          Group II 
P. Lithosphere               1. 2900 km 
Q. Mantle                      2. 2250 km 
R. Outer Core                3. 1200 km 
S. Inner Core                 4. 100 km 
 

• A. P-3 Q-4 R-1 S-2
• B. P-4 Q-1 R-3 S-2
• C. P-1 Q-2 R-3 S-4
• D. P-4 Q-3 R-2 S-1

Hint:

The earth's layers vary significantly in thickness, with the lithosphere being the thinnest and the mantle being the thickest.

Answer 1

The Correct Option is A

Step 1: Understanding the question.
This question asks to match the earth's layers with their approximate thicknesses. The lithosphere, mantle, core, and other layers vary in thickness.
Step 2: Analyzing the options.
(A) P-3 Q-4 R-1 S-2: Correct — The lithosphere has a thickness of about 100 km, the mantle is about 2900 km, the outer core is around 2250 km, and the inner core is about 1200 km.
(B) P-4 Q-1 R-3 S-2: Incorrect — The lithosphere and mantle thicknesses are swapped.
(C) P-1 Q-2 R-3 S-4: Incorrect — The thicknesses are mismatched in this option.
(D) P-4 Q-3 R-2 S-1: Incorrect — The mantle and outer core are mismatched in this option.
Step 3: Conclusion.
The correct answer is (A) P-3 Q-4 R-1 S-2, as it correctly matches the earth layers with their approximate thicknesses.