Here's a breakdown of the terms:

* Meteoroid: A small rock or particle of dust in space.

* Meteor: The streak of light we see when a meteoroid enters the Earth's atmosphere and burns up.

* Meteorite: A meteoroid that survives its journey through the atmosphere and hits the Earth's surface.

So, the answer to your question depends on where the rock is in its journey. If it's just floating in space, it's a meteoroid. If it's burning up in the atmosphere, it's a meteor. And if it hits the ground, it's a meteorite.