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What evidence do you have that Mars had much more liquid water at its surface in the past than it has today?
Wiki User
∙ 9y ago
They have no solid evidence or proof only theories and hypothesis. That's science of today for you. Teaching things as fact which are still only theories....
There is plenty of very solid evidence that water did exist on Mars and still exists today. There are channels that are cut into the rock by some liquid and we have found ice on the planet. We know that the planet was far warmer at one time, so the only logical conclusion is that water did flow on Mars at one time.
We often teach theories as fact, depending on the level of knowledge we have on the subject. The Theory of Relativity is till a theory. Only the absolute most fool hardy would care to fight that theory though. In only way knowledge ever grows is by teaching what we know and moving forward from that point. The best guess and logic certainly indicates that the ice we found on Mars, at one time did flow.
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To the first answer. Users here ask genuine, technical questions to which they expect serious answers, as the second response gives. We do not want gratuitous attacks on science, by people whose comments clearly show utter ignorance of scientific methods, and do not even see the heavy irony of using the internet to mount those attacks.
Wiki User
∙ 9y ago
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What makes us think that mars must once have had an atmosphere that was warmer and had higher surface pressure?
The atmosphere is too cold and thin for liquid water today, yet we see evidence that water flowed on the surface in the past.
What features on the surface of mars or the moon indicate possible previous existence of liquid water?
evidence of ice.
Which planet doesn't contain liquid water?
None of the planets in our solar system except Earth are thought to have surface liquid water in any considerable amount. Some planets are known to have water ice or atmospheric water vapor; some moons of Saturn and Jupiter (which are not planets) show evidence of having sub-surface oceans of liquid water owing to tidal heating effects; other planets including Mars and Venus (both of which were thought to have significant amounts of surface water in their history) continue to be studied for the possibility of liquid water below the surface.
It is to hot for liquid water to exist?
It is too cold for liquid water to exist on the surface
What evidence shows that mars may once have a liquid water?
There was frozen water that they found.
What makes us think that mars must once have had an atmosphere that was warmer and had higher surface pressure?
The atmosphere is too cold and thin for liquid water today, yet we see evidence that water flowed on the surface in the past.
Can you find an ocean on mars?
No. While there is evidence of liquid water beneath the surface there are no oceans on Mars.
What features on the surface of mars or the moon indicate possible previous existence of liquid water?
evidence of ice.
What evidence suggests that liquid water is or once was present on mars?
There is evidence that there was once water on Mars due to large gullies on its surface. This may suggest that running liquid water may have eroded it away and the fact that Mars has 'frozen' ice caps may suggest that it was once liquid water that had frozen over a large period of time.
Where is the liquid water on the Moon?
There is no liquid water on the moon. There is some evidence that there is frozen water.
What evidence supports the idea that life could have evolved on europa?
Evidence to support the idea that life could have evolved on Europa includes the presence of a subsurface ocean with conditions potentially suitable for life, such as the presence of water, organic molecules, and a source of energy from hydrothermal vents. Additionally, observations of plumes of water vapor and evidence of past geological activity suggest that Europa could have the necessary ingredients for life to have evolved.
Which planet doesn't contain liquid water?
None of the planets in our solar system except Earth are thought to have surface liquid water in any considerable amount. Some planets are known to have water ice or atmospheric water vapor; some moons of Saturn and Jupiter (which are not planets) show evidence of having sub-surface oceans of liquid water owing to tidal heating effects; other planets including Mars and Venus (both of which were thought to have significant amounts of surface water in their history) continue to be studied for the possibility of liquid water below the surface.
What is considered evidence that a planet or a moon once had liquid or water on its surface?
dry river beds etched in the surface the existence of compounds that are known to form only in the presence of water residual moisture content in the rocks
Which of the following is not a piece of evidence supporting the idea that Europa may have a subsurface ocean?
NOT A PIECE OF EVIDENCE (as the question asked for ): Astronomers have detected small lakes of liquid water on Europa's surface.
Did Venus once have running water?
There is no known evidence of liquid water every having existed on Venus, but it is quite possible that surface conditions were once very different from what they are now. Note that the surface of Venus has not been studied as extensivley as the surface of Mars.
Formed as a liquid when steam meets a cold surface?
Condensation occurs when steam comes into contact with a cold surface, causing it to lose heat energy and transform into liquid water. This process is the opposite of evaporation, where liquid water turns into steam by gaining heat energy.
It is to hot for liquid water to exist?
It is too cold for liquid water to exist on the surface
