Question

question 18 of 29 > evidence clearly suggests that significant amounts of water can be found on mars today. determine whether each form of water is or is not a present form of water on mars. present forms of water on mars not present forms of water on mars answer bank streams and rivers flowing through gulleys and river deltas layer of subsurface ice below ground vast ocean of salty water precipitation from thick atmosphere rich in water vapor water frozen in polar ice caps

Explanation:

Mars has subsurface ice, water frozen in polar ice - caps. There are no large - scale flowing streams/rivers, no thick water - vapor rich atmosphere for precipitation, and no vast oceans of salty water.

Answer:

Present forms of water on Mars: layer of subsurface ice below ground, water frozen in polar ice caps
Not present forms of water on Mars: streams and rivers flowing through gulleys and river deltas, precipitation from thick atmosphere rich in water vapor, vast ocean of salty water