What makes Europa interesting to scientists?Group of answer choicesIt has a thick atmosphereIt has a liquid water ocean under its surfaceIt has many volcanoesThey have discovered people living there.

1.Question 1The existence of an ocean on Europa has been established from several different lines of evidence. First, spectroscopy of the surface shows that water ice is present. Second, gravitational measurements show that the upper layer of Europa is low density. The third line of evidence is the most convincing. What is this most convincing line of evidence?1 pointElectric currents within the ocean induce magnetic fields which have been measured.Many geological features suggest the presence of liquid underneath the ice.Europa has definitive evidence of plumes of water coming from the interior.When the surface ice shell of Europa flexes due to tidal forces, the magnitude of the effect is much larger than it would be for a thick solid shell.The faint hum of whale songs can be heard coming from underneath the iceEuropa has an oxygen atmosphere

Europa, a moon that orbits Jupiter, is quite different from Earth’s Moon. One characteristic it shares with Earth’s Moon is that Europa– Select one:contains water.highlight_offorbits a planet.highlight_offis covered in ice.highlight_offhas an atmosphere of oxygen.

2.Question 2Why do we think that Enceladus seems less likely to have developed life than Europa (although, admittedly, we don't really know)?1 pointUnlike Europa, the ocean of Enceladus is not in contact with a rock core.Liquid water on Enceladus might be a recent phenomenon, giving insufficient time for life to evolveEnceladus does not have the complex organic materials known to be present on EuropaIt is difficult to imagine life evolving in an active plume.The low density of Enceladus suggests a rocky core which is too small to provide the heat required to have a liquid water layer.At the distance of Enceladus, the liquid water would be too cold for life

Which object in the solar system is of interest to scientists because of its thick atmosphere and lakes of methane on its surface?Group of answer choicesTitanEuropaIoEnceladus

“The existence of a recently formed liquid water ocean makes Mimas a prime candidate for study, for researchers investigating the origin of life,” explains Dr Cooper. The discovery was made possible by analysing data from NASA's Cassini spacecraft, which meticulously studied Saturn and its moons for over a decade. By closely examining the subtle changes in Mimas's orbit, the researchers were able to infer the presence of a hidden ocean and estimate its size and depth.