Small pieces of rock that enter Earth's atmosphere at speeds of 15 to 70 km/s and burn up are called
stars
meteors
meteorites
asteroids
A comet develops a coma because of
gravity
Earth's atmosphere
the Oort Cloud
heat from the sun
stars
meteors
meteorites
asteroids
A comet develops a coma because of
gravity
Earth's atmosphere
the Oort Cloud
heat from the sun