question_answer1) _________ comprises the southernmost extremities of three major oceans ? the Pacific, Atlantic and Indian.
question_answer2) Water covers about ________ per cent of the earth?s surface.
question_answer3) The _________ is a narrow contact zone of water, air and land that supports all life on this planet.
question_answer4) Strong winds called __________ blow in the stratosphere.
question_answer5) The ozone layer protects us from harmful __________ rays.
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