meteorology articles
What physical phenomenon causes clouds to initially appear white?
What is the most significant factor that causes a cloud to appear dark grey?
When sunlight penetrates a thin cloud layer, how does it typically appear to the observer?
Why does the base of a very thick cloud appear dark or nearly black?
What is the most immediate, real-world implication of a cloud appearing significantly dark?
Which type of cloud, consistently dark due to being horizontally extensive and thick, often signals steady, prolonged rain or snow?
The darkest clouds, often associated with thunderstorms, are defined by their enormous vertical extent. What are these clouds called?
What scenario can cause a deep, moisture-laden cloud to look dark without rain hitting the ground overhead?
How do very large particles (like large raindrops or hailstones) contribute to a darker cloud base?
What atmospheric condition is required for the development of dark, towering storm clouds that build great vertical mass quickly?
Why do thin, wispy Cirrus clouds appear translucent or bright white rather than dark?
When can a cloud appear dramatically dark due to the sun's position relative to the observer?
What are interstellar clouds called when they are cold enough to form molecules?
What primary process must gravity overcome for cloud collapse to begin?
Which force is identified as the most significant non-thermal pressure source resisting collapse in large, cold clouds?
What physical condition mathematically describes whether a cloud will collapse under its own weight?
If a region within a cloud possesses a mass greater than its Jeans Mass ($M_J$), what is the guaranteed result?
How does cooling affect the Jeans Mass ($M_J$) relationship within a molecular cloud?
What usually triggers the initial instability in a cloud that might otherwise be stable overall?
What is the primary role of external events like colliding molecular clouds?
How does the process of gravitational collapse affect the structure of the initial large cloud?