Most of the earth's surface is covered by what? oceans ice continental crust forests

The earth surface is covered by water and 30% is taken  on the seven continental landmasses . So i would say the answer is Oceans

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most of the earth is covered with oceans

The roof and walls of the auditorium or cinema hall are generally covered with sound absorbent materials like draperies or compressed fibreboard to reduce reverberation. These materials reduce the formation of echoes by absorbing sound waves.

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