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476 - EASA Drone A2 License - If the environmental lapse rate is much greater than the standard 2°C per 1,000 ft (e.g., the air cools very rapidly with height), the atmosphere is considered:

Question 476 - Meteorology - EASA Drone License A2

Absolutely stable with no chance of clouds
Unstable, which promotes the development of strong updrafts, turbulence, and convective clouds
A perfect vacuum for drone flight
A permanent temperature inversion

Training tests and timed exam simulations EASA Drone License A2