Aim of the lesson

1. 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

2. 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

3. 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

4. Formation of Convectional / Relief / Frontal Rainfall Water vapour Condenses to form clouds Mountains on the west coast of Britain forces the air to rise Onshore moisture laden winds Further cooling leads to precipitation Evaporation of water from the ocean 2,000+ mm Air cools down Occurs in the mountains on the west coast of Britain 1,000 mm Under 750 mm

5. Formation of Convectional / Relief / Frontal Rainfall Water vapour Condenses to form clouds Further cooling leads to heavy precipitation Warm air rises Air cools down Ground heats up the air Occurs in Britain in the late afternoon after the maximum heating In the tropical rainforest every afternoon Sun’s rays heat up the ground

6. Formation of Convectional / Relief / Frontal Rainfall Occurs mainly in winter in Britain but can occur any time of the year Warm moisture laden air from the south meets cold air from the north and forms the Warm Front Air cools down Water vapour Condenses to form clouds Warm air Further cooling leads to precipitation along the Warm Front Cold air Warm air rises

7. 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)

8. Plenary • Outline 3 or 4 things that you learnt today

9. Formation of Relief Rainfall Occurs in the mountains on the west coast of Britain Water vapour Condenses to form clouds Further cooling leads to precipitation Air cools down Onshore moisture laden winds Mountains on the west coast of Britain forces the air to rise Under 750 mm 2,000+ mm 1,000 mm Evaporation of water from the ocean

10. Convectional Rainfall Water vapour Condenses to form clouds Further cooling leads to heavy precipitation Sun’s rays heat up the ground 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

11. Frontal or Depression rainfall Occurs mainly in winter in Britain but can occur any time of the year Water vapour Condenses to form clouds Air cools down Warm air Warm air rises Cold air Further cooling leads to precipitation along the Warm Front Warm moisture laden air from the south meets cold air from the north and forms the Warm Front

12. Similarities and differences • 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