How can water remain liquid at -90F in the underground lake on Mars? The liquid water contains ________ that can dramatically lower the freezing point of water.  The possible Liquid Water signature may be better explained by the mineral _________. (Select Two answers below)Group of answer choicesperchlorate saltssodium chloridepotassium chloridemagnesium chloridecalcium saltskaolinsmectiteillitechlorite

If Marvin the Martian is thirsty, then where must he go to find water (ice) or brine on Mars?(Select All the answers that are correct)Group of answer choicesthe polar capsthe permafrost layer below the surfacean underground lake of brine or water-rich claysthe network of canals covering the surface

Water is unique in that all three of its phases exist over a small range of pressures and temperatures, as shown in Figure 1.Figure 1  Phase diagram for waterIn the liquid phase, water dissolves and transports molecules, and aids in the biochemical reactions necessary to support life.  For this reason, scientists believe liquid-phase water is essential to the existence of extraterrestrial life.  Although it has been known for some time that water is present in both the gas and ice phases on Mars, the question remains as to whether there are regions where liquid-phase water can stably exist.  Estimates of Mars' surface temperature and pressure generated from satellite readings and global climate models, as well as observations made by Mars rovers, reveal that surface conditions on the planet can vary greatly.Table 1  Temperature and Pressure of Various Locations on MarsLocation/Mission Temperature PressureEstimated planetary average 218 K 6.00 mbViking I 256 K 7.11 mbPathfinder 260 K 6.60 mbSpirit 313 K 6.50 mbDespite the extremely low pressures and temperatures on Mars, satellite images have repeatedly found evidence of flowing liquid water in several regions during the late Martian summer season.  These regions, called recurring slope lineae (RSL), are hypothesized to be thermodynamically stable under certain Martian conditions due to the presence of dissolved salts.  A simple understanding of this hypothesis is afforded by Raoult's law, which states that the vapor pressure and freezing point of an ideal solution are lowered as the number of moles of dissolved solute increases.  Moreover, this effect also impacts the solution boiling point (the point at which the vapor pressure of the solution becomes equal to the ambient pressure).The briny-water hypothesis was confirmed in 2015 when spectral data from the Compact Reconnaissance Imaging Spectrometer onboard the Mars Reconnaissance Orbiter revealed the presence of hydrated perchlorates in the same regions and times that RSL were observed.  Studies are already underway to determine how common such briny water flows are and whether the conditions within them are suitable for microbial life. Question 6Which of the following affects the freezing point of an ideal solution?The strength of intermolecular forcesThe strength of intramolecular forcesThe melting point of the soluteA.I onlyB.II onlyC.I and III onlyD.II and III only

Where is the purest water likely to be found among the following alternatives?ResponsesA Rain waterRain waterB Water evaporated from puddlesWater evaporated from puddlesC Irrigation waterIrrigation waterD Lake water

Question 1 of 15Match the water cycle element in column 1 with the characteristic in column 2.GlaciersRiversGroundwaterOceans?97 percent of Earth's water?70 percent of Earth's freshwater?100 times more water than in all rivers and lakes?Powered by gravity

Multiple Choice QuestionWhich water compartment contains the largest proportion of earth's liquid water?Multiple choice question.GroundwaterGlaciersOceansRivers