What causes the visible, bright streak associated with a meteor event?
Answer
Intense heating and vaporization caused by friction with air molecules.
As the small piece of cosmic debris slams into the atmospheric gases, the resulting friction generates intense heat, causing the object to vaporize and produce a bright flash of light.

#Videos
Objects Fall from Space Where There Is No Gravity, Here's Why
Related Questions
What physical property prevents Earth from spiraling inward toward the Sun?Why do stellar movements remain imperceptible to the naked eye over human timescales?What is the physical nature of objects commonly referred to as "falling stars"?What causes the visible, bright streak associated with a meteor event?What is the primary force responsible for keeping stars organized and in motion within a galaxy?How far away is the nearest known star system to our own?What principle explains why meteor streaks in a shower appear to converge toward a radiant point?What is the fundamental source of energy for a true star like our Sun?If a real star were to approach close enough to be visibly observed as 'falling,' what effect would dominate?What is the Sun's estimated speed as it orbits the center of the Milky Way?