What’s the fundamental reason that Mars Unlike the Earth has become virtually geologically dead quizlet?
Mars lost any global magnetic field that it may once have had. This allowed the solar wind to strip atmospheric gas into space.
What makes a planet geologically dead?
Mercury and the Moon, similar in size and appearance, are both geologically dead because of their relatively small size. Mars is bigger than Mercury but not big enough to have retained enough geological activity to continuously replenish the atmosphere, which is constantly lost to space.
Which of the following could explain why Mars today lacks a global magnetic field like that of Earth?
Terms in this set (20) Recent evidence suggests that Mars once had a global magnetic field. Assuming this is true, which of the following could explain why Mars today lacks a global magnetic field like that of Earth? Mars's interior has cooled so much its molten core layer no longer undergoes convection.
What are the two geological features that appear to set Earth apart from all the other terrestrial worlds group of answer choices?
Ch7 concept quiz
| Question | Answer |
|---|---|
| Which of the following most likely explains why Venus does not have a global magnetic field like Earth? | its rotation is too slow |
| What are the two geological features that appear to set Earth apart from all the other terrestrial worlds? | plate tectonics and widespread erosion |
What makes us think that Mars must once have had an atmosphere that was warmer and thicker?
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. Mars lost any global magnetic field that it may once have had.
Which of the following does not provide evidence that Mars once had large amount of flowing water?
astronomy final shelley
| Question | Answer |
|---|---|
| Olympus Mons is ______. | a huge shield volcano on Mars |
| Which of the following does not provide evidence that Mars once had abundant liquid water on its surface? | the presence of canali, discovered in the late 1800s by Giovanni Schiaparelli and mapped by Percival Lowell. |
Is Mars still geologically active?
Previous research suggested the Red Planet may still have flared with smaller volcanic eruptions as recently as 2.5 million years ago. Now scientists have found evidence that Mars may still be volcanically active, with signs of an eruption within the past 50,000 years or so.
Which planet is known as dead planet?
Mercury is a dead planet and the most heavily cratered object in the solar system. It is a world of black starry skies, gray craters, no moon and not enough gravity to hold an atmosphere.
What makes us think that Mars in the past must have had an atmosphere that was warmer and had higher surface pressure?
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. Mars lost any global magnetic field that it may once have had.
Why did Mars lose its atmosphere but not Earth?
NASA pointed out that Mars had a thick atmosphere shortly after it was formed, and most of the composite in its atmosphere was carbon dioxide. However, due to the lack of magnetic field protection, the majority of the Martian atmosphere was destroyed by the strong solar wind, and escaped to space (Carlisle, 2015).
What is the main factor that makes Earth more geologically active than the other terrestrial planets?
Internal heat Why is Earth geologically active? Internal heat drives geological activity. – Larger the planet, more heat retained. – Circulation of liquid outer core creates Earth's magnetic field.
What makes us think that Mars must once have had an atmosphere that was warmer and had higher surface pressure quizlet?
Mars lost any global magnetic field that it may once have had. What makes us think that Mars must once have had an atmosphere that was warmer and had higher surface pressure? The fact that parts of Mars have a lot of craters tell us that Mars must once have been much warmer.
What happened to Mars atmosphere over time?
Unfortunately, the magnetic field disappeared, which caused the planet's atmosphere to be stripped over time to the point that it became extremely thin (as it is today). Scientists attribute this to Mars' lower mass and density (compared to Earth) which resulted in its interior cooling more rapidly.
How did Mars lose its atmosphere?
NASA pointed out that Mars had a thick atmosphere shortly after it was formed, and most of the composite in its atmosphere was carbon dioxide. However, due to the lack of magnetic field protection, the majority of the Martian atmosphere was destroyed by the strong solar wind, and escaped to space (Carlisle, 2015).
What geological process formed Mars?
The most likely geologic process to form the channel on Mars is continental drift, the same process that forms modern channels like the mid-Atlantic…
What does geologically active mean?
When we talk about “geologically active” as it relates to Earth, we know what that means: mountain-building processes, volcanic flows, earthquakes, canyon-creating processes, plate motions, erosion (by wind and water), and so on. These are processes that geologists study.
Why is Mars called a dead planet?
Mars is nearly, or perhaps totally, geologically dead; the end of volcanic activity has apparently stopped the recycling of chemicals and minerals between the surface and interior of the planet.
How long has Mars been dead?
4 billion years ago However, tracing the Martian surface magnetic field indicated that Mars lost its magnetic field 4 billion years ago, leaving the atmosphere under severe attack by the solar wind.
What makes us think that Mars must once have had an atmosphere that was warmer and has higher surface pressure quizlet?
Mars lost any global magnetic field that it may once have had. 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 of flowing water in the past.
How is Mars different from Earth?
Mars is about half the size of Earth by diameter and has a much thinner atmosphere, with an atmospheric volume less than 1% of Earth's. The atmospheric composition is also significantly different: primarily carbon dioxide-based, while Earth's is rich in nitrogen and oxygen.
Why has Mars been losing its atmosphere?
NASA pointed out that Mars had a thick atmosphere shortly after it was formed, and most of the composite in its atmosphere was carbon dioxide. However, due to the lack of magnetic field protection, the majority of the Martian atmosphere was destroyed by the strong solar wind, and escaped to space (Carlisle, 2015).
What caused Mars to dry up?
“Carbon dioxide is a strong greenhouse gas, so it really was the leading candidate to explain the drying out of Mars,” said Kite, an expert on the climates of other worlds.
Why is the Earth geologically active quizlet?
Terms in this set (11) Why is Earth geologically active? it is large for a terrestrial planet. — That heat drives geological activity, keeping the core molten and driving geological activity.
Which of the following does not provide evidence that Mars once had abundant liquid water on its surface Group of answer choices?
astronomy final shelley
| Question | Answer |
|---|---|
| Olympus Mons is ______. | a huge shield volcano on Mars |
| Which of the following does not provide evidence that Mars once had abundant liquid water on its surface? | the presence of canali, discovered in the late 1800s by Giovanni Schiaparelli and mapped by Percival Lowell. |
What is the primary reason why Mars lost its atmosphere?
Solar wind and radiation are responsible for stripping the Martian atmosphere, transforming Mars from a planet that could have supported life billions of years ago into a frigid desert world, according to new results from NASA's MAVEN spacecraft.
Why is Mars losing its atmosphere?
While there are theories on what led to such a loss, the consequences were catastrophic. Devoid of the protective shield, the rocky planet was exposed to harsh and forceful solar winds, which blew the Martian atmosphere away.
How did Mars lose its atmosphere quizlet?
CQ: Why did mars lose most of its atmosphere? Its atmosphere condensed onto the poles and froae into the soil bc mars is farther from the sun, it lost its atmosphere to space after losing its magnetic field, its small size prevented it from holding its atmosphere, its interior cooled so volcanic outgassing stopped.
What happened to Mars?
Thanks to data from rovers and other spacecraft, we know that the Red Planet once fairly sloshed with water—with dry deltas, riverbeds, and sea basins stamped into its surface. But 4 billion years ago, the Martian core cooled, shutting down the dynamo that sustained its magnetic field.
Why is Mars geologically active?
Recent and continuing missions to Mars are showing that the Red Planet may be more geologically active than previously thought. Volcanoes and erosion by running water have shaped the surface. And evidence is growing that fluvial and possibly volcanic processes have been active in the very recent past.
How is the geology of Mars different from the geology on Earth?
The geologic histories of Mars and Earth are quite different, partly because of the internal dynamics of the planets and partly because of the differing effects of the atmospheres and oceans. Earth's geology is dominated by the effects of plate tectonics.