Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Meteoroids are smaller than asteroids, ranging from the size of boulders to the size of sand grains. When meteoroids enter Earth's atmosphere, they vaporize, creating a trail of glowing gas called a meteor. If any of the meteoroid reaches Earth, the remaining object is called a meteorite. Answer: meteorite
When a meteoroid reaches earth, what is the remaining object called?