First comets are made up of ice for the most part this was an asteroid made up of rock/metals.
Second that would depend on several factors like what its made of and how that material is compressed.Also speed and angle play a factor super steep and it would burn up are explode.Super shallow and it could bounce off.
Second that would depend on several factors like what its made of and how that material is compressed.Also speed and angle play a factor super steep and it would burn up are explode.Super shallow and it could bounce off.