Transcript Types of rainfall PowerPoint

Aim of the lesson
• By the end of the lesson I should know
• The characteristics of the 3 types of
rainfall.
• The similarities between the types of
rainfall.
• The differences between them
Learning outcomes
• By the end of the lesson I should have
• Reorganised the slides on the three types
of rainfall
• Described the similarities and differences
• Extension activity
• Custom animated them into a logical
sequence
Types of rainfall
• Move the items into the correct places on
the slide and use custom animation to
show the sequence of events
• Put a correct title on each type of rainfall
by removing the other types from the title
Formation of Convectional / Relief / Frontal Rainfall
Water vapour
Condenses to
form clouds
Mountains on the west coast
of Britain forces the air to rise
2,000+ mm
1,000 mm
Onshore
moisture laden
winds
Under 750 mm
Further cooling
leads to precipitation
Air cools
down
Evaporation of water
from the ocean
Occurs in the mountains on
the west coast of Britain
Formation of Convectional / Relief / Frontal Rainfall
Water vapour
Condenses to
form clouds
Further cooling
leads to heavy
precipitation
Warm air rises
Ground heats up the air
Air cools down
Occurs in Britain in the late afternoon after the maximum heating
In the tropical rainforest every afternoon
Sun’s rays heat up
the ground
Formation of Convectional / Relief / Frontal Rainfall
Occurs mainly in
winter in Britain but
can occur any time
of the year
Water vapour
Condenses to
form clouds
Warm moisture laden air
from the south meets cold
air from the north and forms
the Warm Front
Air cools down
Warm air
Warm air rises
Cold air
Further cooling leads
to precipitation along
the Warm Front
Types of rainfall
• Complete these exercises
• Describe the similarities between the 3
types of rainfall. (4)
• What are the differences between the
types of rainfall? (Think about the reason
for air moving)
Plenary
• Outline 3 or 4 things that you learnt today
Formation of Relief Rainfall
Occurs in the mountains
on the west coast of
Britain
Onshore
moisture laden
winds
Water vapour
Condenses to
form clouds
Further cooling
leads to
precipitation
Air cools
down
Mountains on the west coast
of Britain forces the air to rise
1,000 mm
Evaporation of
water from the
ocean
2,000+ mm
Under 750 mm
Convectional Rainfall
Water vapour
Condenses to
form clouds
Sun’s rays heat up
the ground
Further cooling
leads to heavy
precipitation
Air cools down
Warm air rises
Ground heats up the air
Occurs in Britain in the late afternoon after the maximum heating
In the tropical rainforest every afternoon
Frontal or Depression rainfall
Occurs mainly in
winter in Britain but
can occur any time
of the year
Air cools down
Warm air
Water vapour
Condenses to
form clouds
Warm air rises
Cold air
Warm moisture laden air
from the south meets cold
air from the north and forms
the Warm Front
Further cooling leads
to precipitation along
the Warm Front
Similarities and differences
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All 3 types of rainfall involve
Warm moist air rising
Warm air cooling
Water vapour condensing to form clouds
Further cooling leading to precipitation
The difference is the reason why the air is rising
Relief – air is forced to rise over mountains
Convectional – air is being heated
Frontal – warm air is rising over cold air