full geography secondary 3 express- weather and climate 3

Arman Alluwie TP2 SHSS

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3 Express Pure Geog:Weather and Climate26th March 2012Rain, Pressure and Winds


2+Feedback on Lesson Observation Class’ level of criticality

Good questioning Management of Questions and Answers

Peer Teaching Constructive discussion Helped clear up doubts and concerns of concepts On task during assignments Think- Buzz- Share


3+What did we learn last lesson? Relative Humidity proportion of water vapor present in the air, in

relation to the maximum amount the air can hold1 at particular temperature

expressed as %

1hold: contain100 -

50 -

25 -

relative humidity = 50 %


4+

100 -

50 -

25 -

100 -50 -25 -

change in temperature

relative humidity = 50 %

same amount of water vapour

relative humidity= ?

Relative Humidity


5+

100 - 50 -

change in temperature


relative humidity > 100%

100 -50 -25 -


relative humidity= 100%

beyond saturation point

Relative Humidity


6+What did we learn last lesson? Saturation Point

air is carrying the maximum amount of water vapor it can hold at that temperature


7+What did we learn last lesson?Precipitation Definition: water falling from the atmosphere onto

the Earth’s surface

form depends on the temperature of the place where it falls

Liquid Freezing Frozen

Drizzle Freezing Drizzle Snow

Rain Freezing Rain Hail

Ice Crystals

precipitation ≠ rain


8+Lesson objectives

By the end of the lesson, we will be able to explain the formation of convectional rain and relief rain how air pressure affects movement of air/ wind how coastal temperatures are moderated by land and

sea breezes the formation of monsoon winds

Give a statement as to why something occurs Show an ability to know or understand why or how something happens


9+Convectional Rain

http://www.curriculumbits.com/prodimages/details/geography/types-of-rainfall.html


10+Convectional Rain

occurs when there is intense heating of Earth’s surface which usually takes place in the morning and early afternoon

common in Tropics high temperatures increase capacity of air to hold

large amounts of water vapour high relative humidity


11+Convectional Rain

characteristics of rain, usually in the morning and early afternoon covers only a few square kilometers heavy but short-lived often accompanied by thunder and lightning


12+Relief Rain

http://www.curriculumbits.com/prodimages/details/geography/types-of-rainfall.html

13+Quick Recap:Relative Humidity


land surface large lakes/ oceans

wind directionair parcel

more water vapour


14+Relief Rain

occurs mainly in places where moist air from the sea is forced to rise above a highland such as a mountain range

windward side: side facing the oncoming wind

leeward side receives little or no rain on descending, air is warmed by heat near the

Earth’s surface becoming dry wind


15+Quick Recap:Temperature

at lower ground there is a larger area of land, much warmer at lower ground

20°C

7.2°C


16+Relief Rain

occurs mainly in places where moist air from the sea is forced to rise above a highland such as a mountain range

windward side: side facing the oncoming wind

leeward side receives little or no rain on descending, air is warmed by heat near the

Earth’s surface becoming dry wind “rain shadow” effect


17+Air Pressure and Wind

downward force exerted by the weight of air per unit area

air moves from a region of high pressure to a region of low pressure wind


18+Air Pressure and Wind

high pressure low pressurewind


19+Air Pressure and Temperature

Ground

warm air

cold air

low pressurehigh pressure

wind


20+

pg. 100

Think, Buzz, Share


21+Checkpoint 1 (Share)

What is the difference between convectional rain and relief rain? Define “convectional rain” and “relief rain” Characteristics of “convectional rain” Characteristics of “relief rain”

Complete the following sentences Rising warm air results in _______________ pressure Sinking cold air results in _______________ pressure

How does the air pressure result in the formation of wind?


22+

Weather

Scale and Effect

Local Scale

Regional Scale

Global Scale

eg. flooding in Orchard

eg. Southeast Asian Monsoon and how it affects agriculture in South Asia

eg. Global Warming and the increasing intensity of typhoons

23+Quick Recap:“Maritime Effect”


Water Bodies

Concept: Water bodies heats up and cools down slower

Land bodies

S L O W E R


24+

Weather

Scale and Effect

Local Scale

Regional Scale

Global Scale

eg. Land and Sea Breeze which affects Day and Night Temperatures

eg. Maritime Effect which affects Annual Temperature

Hours

Weeks

Months

25+Land and Sea Breeze


http://oceanservice.noaa.gov/education/pd/oceans_weather_climate/media/sea_and_land_breeze.swf


26+Land and Sea Breeze:Think, Buzz and Share

pg 101

and for the brave, page 93: maritime effect



explain why?


31+The Coriolis Effect

http://www.youtube.com/watch?v=Wda7azMvabE


32+The Coriolis Effect:Playground Visualisation

http://www.youtube.com/watch?v=_36MiCUS1ro


33+The Coriolis Effect:

http://www.youtube.com/watch?v=__SlJtnpCD8


34+South Asian Monsoons:Think Buzz Share

pg 103- 104


35+Lesson objectives

Are we able to explain the formation of convectional rain and relief rain? how air pressure affects movement of air/ wind? how coastal temperatures are moderated by land and

sea breezes? the formation of monsoon winds?

full geography secondary 3 express- weather and climate 3

Education

happensarman alluwie

orchardarman alluwie

winds arman alluwie

dry windarman alluwie

air pressure result

formation of convectional

moist air

convectional rain http