Question

1. how are asteroids different from comets?

asteroids do not contain rocks.
asteroids are smaller than comets.
asteroids do not contain ice.
asteroids do not orbit the sun.

Explanation:

Asteroids are rocky bodies in space. Comets are made of ice, dust, and rocky material. When comets get close to the Sun, the ice vaporizes. Asteroids do not have this ice - based composition.
Asteroids do contain rocks (so the first option is wrong). There is no general rule that asteroids are smaller than comets (so the second option is wrong). Both asteroids and comets orbit the Sun (so the fourth option is wrong).

Answer:

Asteroids do not contain ice.