The water in the ocean could possibly be kept warm by heat coming from inside Europa.
Around it
Because europa has the same impact rate as her sister but europa is one of the smoothest planets, meaning there would be water rising and forming more ice making it look like there is no craters.
Europa is the moon of Jupiter that is known to contain oceans of water.
Europa has ice on it and it is hypothesized that there is an ocean of water below the ice.Some have suggested that there is life on Europa. The Europa Jupiter System Mission (EJSM) has been proposed to investigate this and other aspects in a 2020 launch.
europa
Water
They believe there is liquid water underneath its frozen surface. If there is liquid water on Europa, there might also be life.
Water
WATER!
Europa has a very thin atmosphere that s composed almost entirely of molecular oxygen. Europa it also large volumes of oxygen tied up in water molecules as the surface of Europa is predominantly water and water ice up to 125km thick.
They believe there is liquid water underneath its frozen surface. If there is liquid water on Europa, there might also be life.
As far was we know the development requires water in its liquid for to be present and a source of energy to supply/drive chemical reactions. We know that deep down Europa has a liquid layer (of water) and the geysers of this water into space proves that there is energy in Europa's core.