The part of the earth’s crust that is covered by oceans and seas is called? by Sunday | Jun 14 | Geography WAEC | 0 comments A. biosphere B. hydrosphere C. ionosphere D. stratosphere Correct Answer: Option B – hydrosphere Users Also Read These:Which of the following landforms may occur when…The liquid portion of the earth’s crust is called?The layer of earth found immediately beneath the…A sedimentary rock formed only in seas and oceans in…The most abundant element on the earth's crust is?