unit two: the water cycle Flashcards
1
Q
how does precipitation form?
A
in the atmosphere, when water vapour condenses
- condensation nuclei (small particle in atmosphere around which condensation can take place)
- cooling of air below dew point (temperature at which condensation occurs and is dependent on humidity)
2
Q
how does orographic rainfall occur?
A
when air is forced upwards, due to relief, reaching dew point, cooling and condensing
3
Q
what is convectional rainfall?
A
as sun heats the land and the air above = evaporation. warm air rises, cools and condenses, forming clouds
4
Q
what is frontal rainfall?
A
two large air masses meet, causing the warm, less dense air is lifted up and over the cold, dense air, where it will than cool and condense
5
Q
A
