Question

What characteristic makes up the main difference between an asteroid and a meteoroid?

Answer 1

Asteroids are made up of rock while meteoroids are made up of ice.

that is the answer.

Answer 2

Asteroid: a large rocky body in space, in orbit around the Sun. Meteoroid: much smaller rocks or particles in orbit around the Sun. Meteor: If a meteoroid enters the Earth's atmosphere and vaporizes, it becomes a meteor, which is often called a shooting star.