Question

Which one of the following statements is NOT true?

A. Continents are usually older than oceanic crust
B. Continents are usually more dense than oceanic crust.
C. Continents are usually more deformed than oceanic crust.
D. Continents are usually thicker than oceanic crust.

Answer 1

Continents are usually less dense than oceanic crust.

Step-by-step explanation:

The statement that is NOT true is B. Continents are usually more dense than oceanic crust.

Continental crust is usually less dense than oceanic crust. The average composition of continental crust is granite, which is much less dense than the mafic rocks of the oceanic crust. Due to its lower density, continental crust rises higher on the mantle than oceanic crust, which sinks into the mantle to form basins and the planet's oceans.