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There is no "impact asteroid". An asteroid impact however is when an asteroid hits a planet or moon.
Which asteroid? depending on its size, an asteroid impact could be devastating for life on Earth, though life would recover somehow eventually.
Well there more than two, but examples include an asteroid impact and a volcanic eruption. Both have a history of spewing tons of ash dirt and debris into the air, reflecting the Suns rays, diminishing heat, in consequence affecting the Earths climate.
Well in the one in Arizona, they walk round it.
An asteroid impact
An asteroid/meteor impact is one theory. The truth is that nobody knows for sure, just like the exact origin of the moon is not known for certain.
Impact, as in hit, sure.
An asteroid
There is no "impact asteroid". An asteroid impact however is when an asteroid hits a planet or moon.
There was one significant asteroid impact in 1908 - the Tunguska event. It is possible that smaller asteroids hit Earth after that. There was a smaller asteroid/meteor impact more recently - the Chelyabinsk event in 2013.
it is a result of an asteroid impact
Asteroid impact craters are destroyed by weather, erosion, and earthquakes.
no.
Which asteroid? depending on its size, an asteroid impact could be devastating for life on Earth, though life would recover somehow eventually.
It is more likely to pass right through than impact anything as most of the asteroid belt is empty space.
Depends entirely on the impacting speed and the size of the asteroid. Generally an asteroid impact is not going to bode well for life on Earth
A significant impact to the planet from a large enough asteroid could cause volcanic eruptions.