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Asked in Earth Sciences, Oceanography, Evolution
What events happened in the past that allowed water to form and exist on Earth?
Most scientists believe water came in ice form on comets or meteors that crashed into the Earth. ...
Asked in Planetary Science
What indications might exist to suggest that water existed at one point in time on the surface of Mars?
Mars has dry canyons which were clearly caused by the action of running water in the distant past. ...
Is it true that hydrogen bonds exist within a water molecule?
No. Covalent bonds exist within a water molecule. Hydrogen bonds exist between water molecules. ...
Asked in Astronomy, Planetary Science
Can water exist on a planet with no atmosphere?
Atmospheric pressure is an important factor in keeping liquid water on the surface of a planet. With no atmosphere, liquid water would quickly escape into space. It would depend on various factors such as the temperature and escape velocity of the planet of course. Scientists think liquid water existed on Mars in the past when the atmosphere was a lot denser. Water does exist on the surface Mars, but only as ice. ...