Acquired Reactive Perforating Dermatosis Last updated July 12, 2017 Reactive Perforating Collagenosis (RPC) is a very rare skin disorder that can manifest during early childhood or adulthood.
Fog is a mixture because it is an aerosol of water droplets or ice crystals in air. Fog can also contain molecules of acids or ammonia. Continue Reading
That's because clouds are composeâ¦d of water droplets - liquid water, or water ice - tiny ice crystals. Either way, clouds are not invisible water vapor. Clouds can form as water vapor condenses to form tiny droplets of liquid water. These droplets can come together - coalesce - to form larger droplets. You've seen fog. Fog is a cloud at ground level. And if you've seen fog, then you've seen that clouds are composed of tiny water droplets suspended in air.