State two evidences to show the existance of earth's magnetic field
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1.due to magnetic field the air is traped around the earth. which we called atmosphere
2.and it also protect us from solar winds ementing from the sun . if there is no magnetic field so it is very difficult for survival of human life
2.and it also protect us from solar winds ementing from the sun . if there is no magnetic field so it is very difficult for survival of human life
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