Only if they have to sit too long.
Not really, you're thinking of comets, asteroids are composed of rock, metal, or a combination of both.
Jupiter has an effect on the orbits of the asteroids, but I wouldn't really say that's what holds them in the area beyond Mars.
Not really, though some very large asteroids are referred to as planetoids.
Comets are Comets and Asteroids are Asteroids
the asteroids crashed in Asia have 1000 asteroids
No asteroids have atmospheres.
Asteroids can vary widely in size, with diameters ranging from a few meters to several hundred kilometers. The largest known asteroid, Ceres, has a diameter of about 940 kilometers, while smaller asteroids may only be a few meters across.
meteoroids
Stars are tremendously larger than asteroids and do not become asteroids.
You can see asteroids in the sky.
asteroids are a threat to us
asteroids belt