▁slowly ▁if ▁it ▁moves ▁at ▁all . ▁On ▁Earth , ▁a ▁body ▁of ▁water ▁is ▁considered ▁a ▁lake ▁when ▁it ▁is ▁in land , ▁not ▁part ▁of ▁the ▁ocean , ▁is ▁larger ▁and ▁deeper ▁than ▁a ▁p ond , ▁and ▁is ▁fed ▁by ▁a ▁river . ▁The ▁only ▁world ▁other ▁than ▁Earth ▁known ▁to ▁har bor ▁la kes ▁is ▁T itan , ▁Sat urn ' s ▁largest ▁moon , ▁which ▁has ▁la kes ▁of ▁eth ane , ▁most ▁likely ▁mixed ▁with ▁m eth ane . ▁It ▁is ▁not ▁known ▁if ▁T itan ' s ▁la kes ▁are ▁fed ▁by ▁rivers , ▁though ▁T itan ' s ▁surface ▁is ▁car ved ▁by ▁numerous ▁river ▁b eds . ▁Natural ▁la kes ▁on ▁Earth ▁are ▁generally ▁found ▁in ▁mountain ous ▁areas , ▁r ift ▁zones , ▁and ▁areas ▁with ▁on going ▁or ▁recent ▁gla ci ation . ▁Other ▁la kes ▁are ▁found ▁in ▁end or he ic ▁bas ins ▁or ▁along ▁the ▁courses ▁of ▁m ature ▁rivers . ▁In ▁some ▁parts ▁of ▁the ▁world , ▁there ▁are ▁many ▁la kes ▁because ▁of ▁cha otic ▁d rain age ▁patterns ▁left ▁over ▁from ▁the ▁last ▁Ice ▁Age . ▁All ▁la kes ▁are ▁temporary ▁over ▁ge olog ic ▁time ▁scales , ▁as ▁they ▁will ▁slowly ▁fill ▁in ▁with ▁sed iments ▁or ▁sp ill ▁out ▁of ▁the ▁bas in ▁containing ▁them . ▁ ▁P onds ▁ ▁A ▁p ond ▁is ▁a ▁body ▁of ▁standing ▁water , ▁either ▁natural ▁or ▁man - made , ▁that ▁is ▁usually ▁smaller ▁than ▁a ▁lake