They never have.
Many objects collided with Earth during its formation, ranging in size from dust grains to small planets. The one believed to be responsible for the formation of the moon was about the size of Mars.
We believe that the proto-Earth, very early in the formation of our solar system, probably collided with another planet, one that might have been as large as Mars. The collision probably entirely re-formed the resultant Earth, and that the heavy metallic cores of both planets merged. Debris blasted into space by the collision probably coalesced to form the Moon.
It may have gradually lost its atmosphere to the solar winds or a body or bodies that collided with mars
A meteor hit the earth in the mesozic era
earth is 1 planet away from mars
No. Mars and Earth never collided. Around 4.6 billion years ago another planet is believed to have collided with Earth, resulting in the formation of the moon. This planet, known as Theia, was probably about the same size as Mars.
Many objects collided with Earth during its formation, ranging in size from dust grains to small planets. The one believed to be responsible for the formation of the moon was about the size of Mars.
Theia See related link for more information.
We believe that the proto-Earth, very early in the formation of our solar system, probably collided with another planet, one that might have been as large as Mars. The collision probably entirely re-formed the resultant Earth, and that the heavy metallic cores of both planets merged. Debris blasted into space by the collision probably coalesced to form the Moon.
The giant impact theory proposes that the Moon was formed from debris created when a Mars-sized body collided with Earth early in its history. This collision would have ejected material into space that eventually coalesced to form the Moon. This theory is supported by evidence from lunar samples and computer simulations.
Earth's moon is believed to have formed when Earth collided with a Mars-sized planetoid soon after it formed. Debris from the collision formed a ring around Earth and coalesced into the moon. Scientists still disagree about the origins of Mars' moons Phobos and Deimos. The most prevalent hypothesis is that they are captured asteroids.
No
Before life existed on Earth a Mars like object collided with our planet. A big chunk of the Earth floated away from our planet due to the pressure of the collision. And that big chunk is now what we call, the Moon.
The moon formed when a Mars-sized planet collided with Earth when the solar system was still forming, ejecting a portion of Earth into orbit. That rocky debris came together to form the moon.
the impact theory states that the moon is formed billions of years ago from condensing gas and debris was thrown off when earth collided with a mars sized object
It is not true that the Moon was a chunk of Earth. The leading theory is that the Moon was formed from debris created when a Mars-sized object collided with Earth early in its history. This collision released material that eventually coalesced to form the Moon.
The Moon was - probably - formed when a planet perhaps as large as Mars collided with the Earth. The mass blown out of the Earth merged with the fragments of the other, now destroyed, planet to form the Moon. How far apart are two colliding cars? Zero.