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Because mars has features that suggest water. Also scientists have multiple theories on atmospheric loss on mars. That means that mars has lost air over the millions of years since it was formed. This was caused by the loss of the magnetosphere. The iron in the core of mars has cooled and does not move anymore so now there are only small parts in the Southern Hemisphere that are protected by the magnetosphere. To say it simply, the topmost layer of all the planets atmospheres has been ionized by the suns radiation. Solar wind can, for lack of a simpler explanation, sweep up these ionized particles. Luckily for us, the magnetosphere keeps the solar wind away from earth. But since mars does not have a magnetosphere the atmosphere has slowly been eroded away. The only reason the atmosphere is not gone already is because of dry ice and air pockets under the surface. The dry ice is provided by the ice caps and comets that occasionally hit mars. Dry ice is one of the reasons that mars' atmosphere is mostly CO2. Scientist think that once mars had much more oxygen than it does now.
What else can I help you with?
Why do scientists think Mars was once like the Earth?
Scientists think Mars was once like Earth due to evidence of past water activity, such as dried up river channels, shorelines, and minerals that can only form in the presence of water. Additionally, Mars has a similar geological history to Earth, with evidence of plate tectonics and volcanic activity. These clues suggest that Mars may have had a more Earth-like environment in its distant past.
Is there day and night on Mars?
most scientists think there is but some still have doubts
Why did a volcano like Olympus Mons form on Mars but not on Earth?
Excellent question, and perhaps someday we'll learn that. We do know that large volcanoes do form on Earth, but on Earth the forces of wind and water can erode the mountains and wear them down. On Mars, there is very little atmosphere, and very little water, so there's not much weathering.
How is the weather on Mars during the day?
# mars has four seasons just like earth!!!!!!!!!!!!!! # mars has four seasons just like earth!!!!!!!!!!!!!!
Why do these regions lead scientists to hypothesize that there may have once been life on mars?
Regions on Mars that show evidence of past water flow, organic molecules, and potential sources of energy, such as methane, lead scientists to hypothesize that life could have existed on the planet. These conditions resemble those necessary for life on Earth, suggesting that Mars may have once been habitable.
Why do scientists think Mars was once like the Earth?
Scientists think Mars was once like Earth due to evidence of past water activity, such as dried up river channels, shorelines, and minerals that can only form in the presence of water. Additionally, Mars has a similar geological history to Earth, with evidence of plate tectonics and volcanic activity. These clues suggest that Mars may have had a more Earth-like environment in its distant past.
What does it look like in side of Mars?
Since no human has ever set foot on Mars, it is hard to tell, but scientists think the inside of Mars is kind of like the inside of the earth, with a hot core, and miles of rock.
Is there day and night on Mars?
most scientists think there is but some still have doubts
What do you think the earth would be like without CO?
... like Mars.
How many mars equals 1 earth?
i think like 5
Does Mars have oceans like on earth?
No, mars don't have oceans like on earth.
It used to be more like Earth.?
Mars used to be more like Earth.
Why did a volcano like Olympus Mons form on Mars but not on Earth?
Excellent question, and perhaps someday we'll learn that. We do know that large volcanoes do form on Earth, but on Earth the forces of wind and water can erode the mountains and wear them down. On Mars, there is very little atmosphere, and very little water, so there's not much weathering.
Did Mars used to be like earth?
It is believed that Mars may have been more similar to Earth in the past, with evidence suggesting it had water flowing on its surface and a thicker atmosphere. However, over time Mars lost its atmosphere and most of its water, leading to the cold, dry, and barren planet we see today.
How is the weather on Mars during the day?
# mars has four seasons just like earth!!!!!!!!!!!!!! # mars has four seasons just like earth!!!!!!!!!!!!!!
Does Mars have a earth sign?
Mars is full of frozen water and once was like Earth
Is mars or venus most like earth?
my opinion is mars
