How are the polar regions of Mercury and the Moon Similar quizlet?
How are the polar regions of Mercury and the Moon similar? Both seem to have ice pockets in the deepest, darkest crater floors. Mercury's evolution was different from the Moon's because: dense Mercury had an iron core that shrank, creating the lobate scarps.
How do atmospheres of the Moon and Mercury compare?
Both Mercury and the moon have surfaces, or crusts, composed almost entirely of rock and pocked with craters. Unlike Earth, which has an element-rich atmosphere in which incoming meteorites often burn, Mercury and the moon have thin atmospheres, called exospheres, that hold little gas and offer little insulation.
What is true of the Moon’s orbital and rotational periods?
What is true of the Moon's orbital and rotational periods? They are equal.
How does Mercury’s rotation relate to the Sun?
Mercury rotates in a way that is unique in the Solar System. It is tidally locked with the Sun in a 3:2 spin–orbit resonance, meaning that relative to the fixed stars, it rotates on its axis exactly three times for every two revolutions it makes around the Sun.
How do the atmosphere of the Moon and Mercury compare quizlet?
In size, Mercury is intermediate between: the Moon and Mars. How do the atmospheres of the Moon and Mercury compare? Neither body has a permanent atmosphere.
Do the Moon and Mercury have permanent atmospheres quizlet?
The Earth's escape speed is 11.2 m/s. Give two similarities and two differences between the surfaces of the Moon and Mercury. — Similarities: Are both covered in rock and heavily cratered. They are also have no permanent atmospheres.
How are the Moon and Mercury different?
After all, the two bodies have significant differences: unlike the moon, Mercury has a global magnetic field; its density is higher; there is an abundance of volatile elements such as sulfur; its surface contains much less iron, particularly in its crustal silicates — which indicates that the processes deep inside both …
How are Mercury and Moon similar and different?
Mercury is a planet much like the Moon. It has no atmosphere, and its surface is covered with circular im pact craters and huge, round basins. Most of Mercury looks much like the lunar highlands; apparently it was subjected to the same bombardment that shaped the Moon in primordial times. Yet Mercury is different.
Why are the Moon orbital and rotation period the same?
It's no coincidence. The synchronization between the Moon's orbital period and its rotation period is due to a process tidal locking. The constant pulling back on the Moon acted as a brake, slowing its spin until the rotation period and the orbital period matched.
What is the rotation period of the Moon?
27.3 days With more reading I learned that it takes about the same amount of time for the moon to rotate on its axis (27.3 days) as it does for the moon to make one revolution around Earth (29.5 days).
How is the rotation of Mercury?
Mercury rotates slowly. One rotation takes nearly 59 Earth days to complete. However due to an orbital-rotational resonance ratio of 3:2, a fictitious observer on Mercury would see that a solar day from noon to noon would take about 176 Earth days to complete.
Does Mercury rotate clockwise or counterclockwise?
counterclockwise All of these planets orbit the Sun in a counterclockwise direction, and Mercury, Earth, and Mars rotate counterclockwise around their axes. Venus rotates slowly in a clockwise manner around its axis.
Which of these criteria best explains why the Moon and Mercury do not have atmospheres?
Concept of escape speed to explain why the Moon and mercury have no atmospheres. More massive objects have better chance of keeping atmospheres bc the more massive an object, the greater the escape speed.
Why is the surface of Mercury often compared with that of the Moon?
Mercury is often compared to the moon because its surface looks similar to the backside of the moon (the main source of erosion for both is meteorite impact). Both have weak magnetic fields, but mercury doesn't have any Maria like the moon does. Also, the density of the moon is much less than that of Mercury.
Do the Moon and Mercury have permanent atmospheres?
Because Mercury's escape speed is only 4.2 km/s Mercury has a lot less pulling power meaning that it cannot retain an atmosphere. The Earth's escape speed is 11.2 m/s. Give two similarities and two differences between the surfaces of the Moon and Mercury. … They are also have no permanent atmospheres.
How are the Moon and Mercury similar and different?
Mercury is a planet much like the Moon. It has no atmosphere, and its surface is covered with circular im pact craters and huge, round basins. Most of Mercury looks much like the lunar highlands; apparently it was subjected to the same bombardment that shaped the Moon in primordial times. Yet Mercury is different.
How are surfaces of Mercury and the Moon similar different Why quizlet?
Mercury is often compared to the moon because its surface looks similar to the backside of the moon (the main source of erosion for both is meteorite impact). Both have weak magnetic fields, but mercury doesn't have any Maria like the moon does. Also, the density of the moon is much less than that of Mercury.
How is Mercury and the Moon different?
After all, the two bodies have significant differences: unlike the moon, Mercury has a global magnetic field; its density is higher; there is an abundance of volatile elements such as sulfur; its surface contains much less iron, particularly in its crustal silicates — which indicates that the processes deep inside both …
What is the difference between Mercury and Moon?
Unlike the Moon, Mercury has great cliffs, thousands of kilometers long, that may be wrinkles formed as the planet cooled and shrank. Mercury is denser than the Moon, and it seems to have a large iron core, the source of a weak but detectable magnetic field, a feature the Moon lacks.
What is the rotation of the moon?
approximately 27 days The moon orbits the Earth once every 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis.
Why does the moon not rotate?
The illusion of the moon not rotating from our perspective is caused by tidal locking, or a synchronous rotation in which a locked body takes just as long to orbit around its partner as it does to revolve once on its axis due to its partner's gravity. (The moons of other planets experience the same effect.)
Does the Moon rotate clockwise?
As seen from the north side of the moon's orbital plane, the Earth rotates counterclockwise on its rotational axis, and the moon revolves counterclockwise around Earth.
Why does the Moon not rotate?
The illusion of the moon not rotating from our perspective is caused by tidal locking, or a synchronous rotation in which a locked body takes just as long to orbit around its partner as it does to revolve once on its axis due to its partner's gravity. (The moons of other planets experience the same effect.)
Does Mercury rotate slower than revolves?
Orbit and Rotation It speeds around the Sun every 88 days, traveling through space at nearly 29 miles (47 kilometers) per second, faster than any other planet. Mercury spins slowly on its axis and completes one rotation every 59 Earth days.
Does the moon rotate?
The moon does rotate on its axis. One rotation takes nearly as much time as one revolution around Earth. If the moon were to rotate quickly (several times each month) or not rotate at all, Earth would be exposed to all sides of the moon (i.e. multiple different views).
What’s the rotation of Mercury?
59 Earth days Mercury rotates slowly. One rotation takes nearly 59 Earth days to complete. However due to an orbital-rotational resonance ratio of 3:2, a fictitious observer on Mercury would see that a solar day from noon to noon would take about 176 Earth days to complete. (This is assuming an observer is not at one of the poles.
Why do Mercury and the Moon have almost no atmosphere quizlet?
Why do mercury and the Moon have almost no atmosphere? A – The gravity at their surfaces is low, so most gas molecules travel fast enough to escape the planet.
Why do the Moon and Mercury have so little atmospheric gas?
The hotter the atmosphere, the more molecules can escape. The smaller the object, the lower the gravity, so the escape velocity is lower and it is harder to retain an atmosphere (Moon and Mercury). Finally, you can lose atmosphere to the surface.
How is the Moon and Mercury different?
Unlike the Moon, Mercury has great cliffs, thousands of kilometers long, that may be wrinkles formed as the planet cooled and shrank. Mercury is denser than the Moon, and it seems to have a large iron core, the source of a weak but detectable magnetic field, a feature the Moon lacks.
What are the differences between the Moon and Mercury?
After all, the two bodies have significant differences: unlike the moon, Mercury has a global magnetic field; its density is higher; there is an abundance of volatile elements such as sulfur; its surface contains much less iron, particularly in its crustal silicates — which indicates that the processes deep inside both …