because they are filled with water and the water got their from evaperation
when the clouds are dark those are rain clouds
Cumulus clouds become Cumulonimbus (dark towering clouds) when enough water vapor condenses in the same spot.
Dark rain Clouds are clouds that are black when it rains
Dark rain Clouds are clouds that are black when it rains
Nimbus clouds are heavy dark clouds.
cirrus clouds are dark and usally bring rain
When more water dropplets gather and clump together ready to fall (rain).
"dark billowing clouds" isn't a sentence. Dark and billowing are adjectives describing clouds, a plural noun.
dark clouds gives heavy rain while white clouds gives us fine weather
Dark Clouds - song - was created in 1997-02.
Clouds don't turn dark. They get larger and thicker and cover the sun more effectively, and that makes the bottoms of the clouds appear dark and makes it dark underneath them.
rain clouds
What word describes low dark clouds