Question

a scientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientists error?
the object is an asteroid, not a dwarf planet.
the object is a moon, not a dwarf planet.
the object is not a dwarf planet because it travels with other objects.
the object is not a dwarf planet because it is round.

Explanation:

A dwarf planet must orbit the Sun. If the object orbits Neptune, it is a moon (natural satellite) of Neptune. Asteroids are irregular - shaped and usually in the asteroid belt. Dwarf planets are round (hydrostatic equilibrium). Also, dwarf planets clear their orbit (dominate their orbital region), but the key here is the orbit around Neptune instead of the Sun.

Answer:

The object is a moon, not a dwarf planet.