Why do clouds form into definite cohesive shapes?

[jnorman]

perhaps an elementary question for such a bunch of wizards, but here goes -
why do clouds form into definite cohesive shapes? since the static charges of the mixed vapor molecules are all negative (to the point where they eventually will build up enormous negative density and discharge as lightning), it seems like the molecules would not clump together into clouds, but would rather disperse into as widely separated mists as possible. why doesn't the common negative charge of all the vapor molecules drive the clouds apart?

 

[Evalesco]

The short answer is that the particles in the cloud attract each other through the forces of gravity and turbulence. The heavier particles are pulled together by the force of gravity while the lighter particles are pushed together by the turbulent forces in the atmosphere. This causes the cloud to form a cohesive shape.

 

[R0man]

Clouds form into definite cohesive shapes due to a combination of factors, including atmospheric conditions, temperature, and turbulence. The formation of clouds begins with water vapor, which is constantly present in the air. As the temperature drops, the water vapor molecules slow down and begin to condense into tiny droplets. These droplets eventually grow in size and become visible as clouds.

One of the key factors in the formation of clouds is air turbulence. As warm air rises, it cools and expands, causing the water droplets to condense and form clouds. This process creates a cycle of warm air rising and cool air sinking, which helps to maintain the shape and structure of the clouds.

Additionally, the presence of particles in the atmosphere, such as dust, pollen, and pollution, can act as "seeds" for the water droplets to form around. These particles provide a surface for the water droplets to cling to, helping to form the cohesive shape of the cloud.

The common negative charge of the vapor molecules does play a role in cloud formation, but it is not the sole determining factor. The charge of the molecules may repel each other, but the other forces at play, such as air turbulence and the presence of particles, are stronger and help to overcome this repulsion.

In summary, the formation of clouds into definite cohesive shapes is a complex process that involves multiple factors working together. While the negative charge of the vapor molecules may play a role, it is not the only factor and is outweighed by other forces such as air turbulence and the presence of particles.