One source of information about Mars has been the analysis of meteorites from Mars. Since no samples from Mars have ever been returned to Earth from any of the missions we sent there, how do we know these meteorites are from Mars? What information have they revealed about Mars?
Question
One source of information about Mars has been the analysis of meteorites from Mars. Since no samples from Mars have ever been returned to Earth from any of the missions we sent there, how do we know these meteorites are from Mars? What information have they revealed about Mars?
Solution
Scientists have been able to identify meteorites from Mars through a combination of factors. Here's a step-by-step explanation:
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Chemical Composition: The chemical makeup of these meteorites is very similar to the rocks and soil on Mars, as measured by the Mars rovers and landers. This includes the ratio of isotopes, which are variations of the same element with different numbers of neutrons.
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Trapped Gas Analysis: Some of these meteorites have trapped gases within them that match the composition of the Martian atmosphere as measured by the Viking landers in the 1970s.
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Age Determination: The age of the meteorites, determined through isotopic dating techniques, is consistent with the age of Mars but not with the majority of rocks found on Earth.
As for the information they've revealed about Mars, these meteorites have provided a wealth of knowledge. They've shown that Mars has a volcanic history, and some meteorites contain evidence of prolonged exposure to water, suggesting that Mars once had a much wetter environment. Some Martian meteorites even contain potential (but disputed) microscopic fossils, which has sparked ongoing debate about the possibility of past life on Mars.
Similar Questions
If the Viking missions were such a rich source of information about Mars, why have we sent the Pathfinder, Global Surveyor, and other more recent spacecraft to Mars? Make a list of questions about Mars that still puzzle astronomers.
What is true of Mars?Group of answer choicesDefinite microfossils have been found.Its atmosphere is mostly water vapor.Iron oxide on the surface is responsible for its reddish color.A pool of water was discovered by the Mars Rover.Its magnetic field is stronger than Earth's
8.Question 8We find chondrules in meteorites that fall from the sky, but we have never found them on the Earth, the Moon, or Mars. Why not?1 pointNone of these is correctMaterials inside large bodies like the Earth, Moon, and Mar undergo so much transformation due to heat and pressure that their original structure is not preserved.Meteorites probably formed from different materials than the planetsThey are in the interior of the Earth where we cannot reach.They most likely form as the meteorite is falling through the atmosphere
Meteorites can provide information aboutGroup of answer choicesThe size of the universeThe destiny of the solar systemThe composition of the solar system before the planets formedThe size of Earth
"The images of Mars taken by the Mariner 9 probe indicate the presence of valleys that looks like the stream beds on Earth. The images also show that Mars once had an atmosphere that was thick enough to trap Sun's heat. If this is true, something must have happened to Mars billions of years ago that stripped away its atmosphere."This paragraph supports which of the following statements:-Mars has little or no atmosphere.Mars once had an atmosphere thicker than Earth's atmosphere.Mariner 9 probe took the first picture of Mars.Mars is closer to Sun than Earth.
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