seas and oceans - large water bodies always have salt water, rivers - large water bodies always have fresh water, streams - small fresh water bodies and running between mountains, aquifer - ground water lies between rocks , estuary - mixture of salt water and fresh water, lakes - water bodies surrounded by land and most of them are fresh and sometimes are salt. , pond - smalll water bodies, most of insects lay their eggs in them, run off - water body comes from rains or melting of snow,

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