Download Types of Precipitation

Types of Precipitation
1. Orographic Precipitation
Orographic precipitation results when warm moist air
moving across the ocean is forced to rise by large mountains.
2. Convectional Precipitation
Convectional precipitation results from the heating of the earth's surface.
1. The warm ground heats the air
over it. As the air warms, the air
molecules begin to move further
apart. The warm air becomes
“lighter” and __________ rapidly.
2. As the air rises, it ________.
Water
vapour
in
the
air
__________________ into clouds
and precipitation.
This type of precipitation is common
in the _______________ in the
_____________ and ____________,
often resulting in extreme weather
conditions such as ____________ or
________________.
3. Cyclonic (Frontal) Precipitation
This type of system is called Frontal Precipitation because the moisture tends to
occur along the front of the air mass.
1. Cyclonic or Frontal precipitation
results when the leading edge of a
___________,
_____________
air mass (warm front) meets a
____________, _____________
air mass (cold front).
2. The warmer air mass is forced
_______ over the cool air. Cold air
molecules are more tightly packed
together (i.e., more dense), and
are thus heavier.
3. As it ___________, the warm air
__________, the water vapour in
the air _____________________,
resulting in clouds and
___________________________.
This precipitation is common in ____________________, _____________________,
the _______________________ and the ________________________.