Which crust is thicker and less dense?

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Multiple Choice

Which crust is thicker and less dense?

Explanation:
This question tests how crusts differ in thickness and density. Continental crust is the thicker and less dense option. It’s mainly granitic in composition, which is lighter, giving a density around 2.7 g/cm^3, and it averages about 30 to 50 kilometers thick (even thicker under mountain ranges). Oceanic crust, by contrast, is thinner—about 5 to 10 kilometers—and more dense because it’s basaltic, with densities near 3.0 g/cm^3. The mantle and outer core aren’t crusts at all, but deeper, much denser layers. So the crust described as both thicker and less dense is the continental crust.

This question tests how crusts differ in thickness and density. Continental crust is the thicker and less dense option. It’s mainly granitic in composition, which is lighter, giving a density around 2.7 g/cm^3, and it averages about 30 to 50 kilometers thick (even thicker under mountain ranges). Oceanic crust, by contrast, is thinner—about 5 to 10 kilometers—and more dense because it’s basaltic, with densities near 3.0 g/cm^3. The mantle and outer core aren’t crusts at all, but deeper, much denser layers. So the crust described as both thicker and less dense is the continental crust.

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