Meteors is the name given to those meteoroids that have collided with the

  Earth´s atmosphere.

Explanation:

  A meteoroid is a small rocky or metallic object from out space. Many of them are fragments of asteroids or comets.

  When these tiny objects enter into the Earth´s atmosphere it began to heat because of the contact with the air and it produces a streak of light that deintegrates the object in the air.

  When this happens rapidly in seconds or minutes and they all come from the same point in the sky it is known as a meteor shower.

  But if the object stands the aerodynamic heating and "survives" to hit the ground, then it is known as a meteorite.

  I hope this answer helps you.

Atmosphere of the earth

Explanation:

The flying debris in the universe is generally termed as asteroids but when these asteroids attempt to hit the earth's surface, they are burned and vaporized into the earth's atmosphere. Such asteroids are known as meteors.

These meteors while burning in earth's atmosphere looks like shooting stars. In case if these meteors somehow survive the impact of atmosphere, they land on the surface of earth and are known as meteorite.

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