Which of the following statements regarding Earth's internal structure is/are <strong>CORRECT</strong>?<br>1. The oceanic crust is heavier than the continental crust.<br>2. Most of the Earth's internal heat is contained within the mantle.<br>3. Large convective cells in the crust circulate heat and drive plate-tectonic processes.<br>Select the answer using the code given below :
- A. 3 only
- B. 1 and 2 only ✓
- C. 2 and 3 only
- D. 1, 2 and 3
Correct Answer: B. 1 and 2 only
Explanation
The oceanic crust (basaltic) is denser and heavier than the continental crust (granitic). Convective cells that drive plate tectonics are located in the mantle, not the crust, making statement 3 incorrect.
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