Answer:
Planet- A large round object is in space and and has an orbit around some kind of star.
Moon- Smaller than planets, moon are usually found orbiting a planet.
Comet- A large ball of ice that lets off a tail of cas escaping from the ice. Commets are found orbiting stars but have a much larger orbit. They are smaller that planets (usually).
Asteroid- A large chunk of rock that floats around in space. Ussualy found in large group orbiting a star or planet.
Dwarf Planet- Pretty much just a planet, but much smaller. They can also come in many differn't shapes, whilst planest usually only are spheres.