Meteoroid

definition: 
A small body moving in the solar system that would become a meteor if it entered the earth’s atmosphere.
sentence: 
Meteoroids are lumps of rock or iron that orbit the sun. Many were once part of larger bodies called asteroids, which orbit the sun between the paths of Mars and Jupiter in a region called the asteroid belt.
difficulty: 
easy
toefl frequency: 
2
toefl classification: