No.
It is believed that the moon was created by matter thrown off by the earth after an impact from a large (Mars-sized) object.
it is thought that this happened about 4.5 billion years ago, when the solar system was still very young.
Yes, but not by much. We believe that the Moon formed when a planet perhaps the size of Mars collided with the proto-Earth, only a few dozen million years after the Sun and solar system formed. The debris blasted into space by the collision later condensed to form the Moon.
None. Both the sun AND earth are older than the moon. No. It appears that the Moon is slightly younger than the Earth. Current theory for its creation is that an object, a protoplanet about the size of Mars called Theia, struck the Earth during its early formation, ejecting matter that consolidated into the Moon. The Sun is older than both the Earth and Moon, but only by a small amount.
It is harder to walk on moon than on earth
The moon is not wider than the earth. Therefore, it can not be much wider than the earth.
"The moon has more gravity than the earth." is a question (about the moon and gravity).
Not sure what you are asking. But on the Moon: The Moon gravity is less than it is on Earth. So by the General Theory of Relativity, time on the Moon elapses faster than comparable time on Earth. So people on the Moon would theoretically age faster than they would on Earth. But...a big BUT...the difference in aging rate would be all but imperceptible. Perhaps you mean the people feel older when they return from the Moon. That would result because Moon walkers would find their muscles atrophying due to the lighter gravity. So when they get back to the greater gravity of Earth they are weak and have difficulty moving around...like an older person.
The earth is not younger than the moon
None. Both the sun AND earth are older than the moon. No. It appears that the Moon is slightly younger than the Earth. Current theory for its creation is that an object, a protoplanet about the size of Mars called Theia, struck the Earth during its early formation, ejecting matter that consolidated into the Moon. The Sun is older than both the Earth and Moon, but only by a small amount.
The moon does not have an active geological process which constantly recycles, and recreates itself. The earth does.
Rocks found on the moon are older because of the lack of erosive forces there. Also, the moon would have cooled more quickly from a molten state than the much larger Earth.
Earth, by far.
If the moon was bigger than the Earth, than Earth would orbit it and, by our current definitions, it would be a moon.
The moon is smaller than earth. The moon is on fourth of Earth, and has less gravity. You would weigh about one sixth on the moon than on the Earth.
It is harder to walk on moon than on earth
The moon is very much smaller than the earth. The moon's atmosphere is thinner than the earth's.
The moon is not wider than the earth. Therefore, it can not be much wider than the earth.
"The moon has more gravity than the earth." is a question (about the moon and gravity).
Not sure what you are asking. But on the Moon: The Moon gravity is less than it is on Earth. So by the General Theory of Relativity, time on the Moon elapses faster than comparable time on Earth. So people on the Moon would theoretically age faster than they would on Earth. But...a big BUT...the difference in aging rate would be all but imperceptible. Perhaps you mean the people feel older when they return from the Moon. That would result because Moon walkers would find their muscles atrophying due to the lighter gravity. So when they get back to the greater gravity of Earth they are weak and have difficulty moving around...like an older person.