Question

1. choose the best description of a comet.

1 meter to 900 km diameter, rocky material, orbits between jupiter and mars
a large meteor that appears as a fireball once it strikes the atmosphere
bodies orbiting the outer planets, some as large as planets
100 meter to 40 km diameter, coma and tail, orbits the sun from the kuiper belt or oort cloud

Explanation:

Comets are icy celestial bodies with a coma (atmosphere) and tail when near the Sun. Their typical diameter ranges from ~100 meters to 40 km, and they originate from the Kuiper Belt or Oort Cloud, orbiting the Sun. The first option describes asteroids (asteroid belt between Mars/Jupiter). The second describes fireballs (meteors entering Earth's atmosphere). The third describes moons of outer planets.

Answer:

100 meter to 40 km diameter, coma and tail, orbits the Sun from the Kuiper belt or Oort cloud