Select the best evidence to support the statement "Planets and moons are not the only places
where one can find water in our solar system." There may be more than one correct choice.
Ice is common in our solar system, from deposits at the poles of Mercury and the
Moon to ice-covered moons and rings around distant Jupiter and Saturn. Scientists
are studying ice on Earth and on other planets, in part because ice deposits could
be a source of water for future explorers in the solar system.
While the most common type of ice in our solar system is water ice, there are
also many other types of ice. Mars' poles have abundant amounts of frozen carbon
dioxide (also called dry ice), and comets have frozen ammonia and methane in
addition to frozen water and other ices. Saturn's moon Titan is famous for its
methane, which can exist not only as a liquid and gas at Titan's surface
temperatures and pressures, but also as solid ice.
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