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 is the atmospheric pressure at the surface of Venus so much higher than Earth’s quizlet?
Venus's extremely high surface temperature is hot enough to melt lead. Venus's atmosphere has a higher altitude and density than Earth's, resulting in a surface pressure that is approximately 90 times greater than on Earth.
Why is the Coriolis effect so weak on Venus?
Why is the Coriolis effect so weak on Venus? Because Venus rotates so slowly.
Which of the following best describes the nature and origin of the atmosphere of the Moon and Mercury?
Which of the following best describes the nature and origin of the atmospheres of the Moon and Mercury? They have thin exospheres only, with gas coming from impacts of subatomic particles and photons.
Why is it so much easier to determine the length of the day on Mars than on Venus?
Why is it so much easier to determine the length of the day on Mars than on Venus? Mars is always much closer to the Earth than Venus. Mars' atmosphere is generally pretty clear (so the surface is visible) while Venus is always cloudy. Mars rotates really slowly so it's easy to follow while Venus rotates very fast.
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.
Why is the atmospheric pressure at the surface of Venus so much higher than Earth’s?
Because Venus has such a dense atmosphere which is some 100 times thicker than the earth's.
Why does Earth’s atmosphere contain much less carbon dioxide than Venus atmosphere?
Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere. Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere.
Why did the terrestrial planets lose the majority of the gas in their primary atmospheres?
Why did the terrestrial planets lose the majority of the gas in their primary atmospheres? They were too hot and their escape velocities too low to hold onto them.
Which exerts stronger gravitational pull on Earth the Sun or the moon?
Based on its mass, the sun's gravitational attraction to the Earth is more than 177 times greater than that of the moon to the Earth. If tidal forces were based solely on comparative masses, the sun should have a tide-generating force that is 27 million times greater than that of the moon.
Why is the length of a sidereal day and a solar day on Venus so different?
The backwards rotation makes Venus the only planet in the solar system where the sidereal day is actually longer than the solar one. The sun returns to it highest point in the sky before the planet has completed one rotation. Combining all this together leaves Venus with a solar day that takes 117 Earth-days.
Does Mars have gold?
In addition, lithium, cobalt, nickel, copper, zinc, niobium, molybdenum, lanthanum, europium, tungsten, and gold have been found in trace amounts.
What key evidence tells us that Mars must once have had a much thicker atmosphere and a much stronger greenhouse effect?
The presence of inactive volcanoes on Mars tells us that there must once have been a lot of outgassing, and hence a thicker atmosphere. The atmosphere is too cold and thin for liquid water today, yet we see evidence that water flowed on the surface in the past.
How does the atmosphere of Mars differ from that of Earth quizlet?
– Mars' atmosphere is mostly carbon dioxide and has a pressure about one hundredth that of Earth. – Mars has a thinner atmosphere and a cold temperature because of the "runaway refrigerator" effect, which is making it colder over time.
Why is the atmosphere of Venus so much hotter and thicker than that of Earth?
Venus is hotter due to the greenhouse effect: Venus has an atmosphere about ninety times thicker than that of Earth, and made almost entirely of carbon dioxide, which is one of the gasses that causes the greenhouse effect on Earth.
Why is atmospheric pressure so high?
Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.
Why is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth why so much more carbon dioxide than on Mars quizlet?
Why is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars? Venus being closer the Sun has a higher temperature and does not have liquid water to store the CO2. On Earth, CO2 was trapped in the oceans and then into the rocks.
Why are the terrestrial atmospheres including the oceans on Earth so different today?
Earth's vulcanism driven atmosphere was likely dominated by carbon dioxide like Venus and Mars, but Earth also has vast oceans of liquid water. Carbon dioxide dissolves easily in water, so our oceans absorbed much of the atmospheric CO2, leaving an atmosphere dominated by ammonia.
Which terrestrial world has the most atmospheric gas?
of Venus Venus has the most massive atmosphere of the terrestrial planets, which include Mercury, Earth, and Mars. Its gaseous envelope is composed of more than 96 percent carbon dioxide and 3.5 percent molecular nitrogen.
Which is stronger the Earth’s pull on the moon or the moon’s pull on the Earth?
Earth exerts an gravitational effect on the moon that is 80 times stronger than the moon's pull on Earth. This massive gravitational pull caused the surface of the moon to bulge toward Earth, similar to how the moon causes large bodies of water on Earth to bulge.
Why does the moon exert more gravitational force on Earth than the much larger sun does quizlet?
Why does the moon exert more gravitational force on Earth than the much-larger Sun does? Because the moon is closer to Earth than the Sun is.
Is a sidereal day now longer shorter or the same length as a sidereal day was before we changed Earth’s orbital direction?
A sidereal day is a bit shorter, about 23 hours 56 minutes 4 seconds. This is because the Earth's movement around the Sun means it has to rotate a bit further to have the Sun at zenith. If a planet both rotates and revolves in the same direction, as the Earth does, the solar day will be longer than the sidereal day.
Does Mars have diamonds?
By modeling the red planet's formation, Desch's research revealed that a process similar to what happened inside Earth could have produced diamonds on Mars, with a magma ocean covering the planet for a few million years.
Can we plant trees on Mars?
Some conditions would make it difficult for plants to grow on Mars. For example, Mars's extreme cold temperatures make life difficult to sustain. Sunlight and heat reaching that planet is much less than what the Earth gets. This is because Mars is about 50 million miles farther away from the sun.
What key evidence tells us that Mars must once have had a much thicker atmosphere and a much stronger greenhouse effect quizlet?
The presence of inactive volcanoes on Mars tells us that there must once have been a lot of outgassing, and hence a thicker atmosphere. The atmosphere is too cold and thin for liquid water today, yet we see evidence that water flowed on the surface in the past.
Why is Mars so cold compared to Venus if both of their atmospheres are made mostly of carbon dioxide a greenhouse gas?
– Mars' atmosphere is mostly carbon dioxide and has a pressure about one hundredth that of Earth. – Mars has a thinner atmosphere and a cold temperature because of the "runaway refrigerator" effect, which is making it colder over time.
How does the atmosphere of Mars differ from that of 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 is it so much easier to determine the length of the day on Mars then on Venus?
Why is it so much easier to determine the length of the day on Mars than on Venus? Mars' atmosphere is generally pretty clear (so the surface is visible) while Venus is always cloudy.
Why there is more atmospheric pressure at the lower level of the atmosphere?
The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude.
Why is the atmospheric pressure at the surface of Venus so much higher than Earth?
Because Venus has such a dense atmosphere which is some 100 times thicker than the earth's.