EVERYDAY SCIENCE

Detailed explanation-1: -On average, oceanic crust is 6–7 km thick and basaltic in composition as compared to the continental crust which averages 35–40 km thick and has a roughly andesitic composition.

Detailed explanation-2: -Continental crust is also less dense than oceanic crust, whose density is about 2.9 g/cm3 (0.10 lb/cu in). At 25 to 70 km (16 to 43 mi) in thickness, continental crust is considerably thicker than oceanic crust, which has an average thickness of around 7 to 10 km (4.3 to 6.2 mi).

Detailed explanation-3: -Continental crust is typically 40 km (25 miles) thick, while oceanic crust is much thinner, averaging about 6 km (4 miles) in thickness.

Detailed explanation-4: -Oceanic crust is thickest at the ridges and mountain ranges that are located at the bottom of the oceans. As tectonic plates that make up the oceanic crust move away from each other, magma from the Earth’s core will rise up to the ocean floor.