What is controlled surface?
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What does a controlled test mean?
Asked in Atmospheric Sciences
Why is a streak of light seen as a meteoroid enters the Earth's atmosphere?
Friction. As solid bodies pass into the atmosphere, the friction of the atmosphere passing over the surface heats them up. A common byproduct of heat is light. Those bodies that fall into the atmosphere that do not have a controlled descent, burn up. Those that are large enough to survive, or that do have a controlled descent, will contact the surface.