Full Geography Secondary 3 Express- Weather and Climate 3
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Transcript of Full Geography Secondary 3 Express- Weather and Climate 3
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Arman Alluwie TP2 SHSS
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3 Express Pure Geog:Weather and Climate26th March 2012Rain, Pressure and Winds
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Arman Alluwie TP2 SHSS
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
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Arman Alluwie TP2 SHSS
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 %
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Arman Alluwie TP2 SHSS
4+
100 -
50 -
25 -
100 -50 -25 -
change in temperature
relative humidity = 50 %
same amount of water vapour
relative humidity= ?
Relative Humidity
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Arman Alluwie TP2 SHSS
5+
100 - 50 -
change in temperature
same amount of water vapour
relative humidity > 100%
100 -50 -25 -
same amount of water vapour
relative humidity= 100%
beyond saturation point
Relative Humidity
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Arman Alluwie TP2 SHSS
6+What did we learn last lesson? Saturation Point
air is carrying the maximum amount of water vapor it can hold at that temperature
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Arman Alluwie TP2 SHSS
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
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Arman Alluwie TP2 SHSS
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
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9+Convectional Rain
http://www.curriculumbits.com/prodimages/details/geography/types-of-rainfall.html
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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
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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
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12+Relief Rain
http://www.curriculumbits.com/prodimages/details/geography/types-of-rainfall.html
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13+Quick Recap:Relative Humidity
Arman Alluwie TP2 SHSS
land surface large lakes/ oceans
wind directionair parcel
more water vapour
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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
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Arman Alluwie TP2 SHSS
15+Quick Recap:Temperature
at lower ground there is a larger area of land, much warmer at lower ground
20°C
7.2°C
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Arman Alluwie TP2 SHSS
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
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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
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18+Air Pressure and Wind
high pressure low pressurewind
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Arman Alluwie TP2 SHSS
19+Air Pressure and Temperature
Ground
warm air
cold air
low pressurehigh pressure
wind
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20+
pg. 100
Think, Buzz, Share
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Arman Alluwie TP2 SHSS
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?
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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
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23+Quick Recap:“Maritime Effect”
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Water Bodies
Concept: Water bodies heats up and cools down slower
Land bodies
S L O W E R
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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
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25+Land and Sea Breeze
Arman Alluwie TP2 SHSS
http://oceanservice.noaa.gov/education/pd/oceans_weather_climate/media/sea_and_land_breeze.swf
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26+Land and Sea Breeze:Think, Buzz and Share
pg 101
and for the brave, page 93: maritime effect
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27+Checkpoint 2 (Share)
explain why?
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28+Checkpoint 2 (Share)
explain why?
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29+Checkpoint 2 (Share)
explain why?
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Arman Alluwie TP2 SHSS
30+Checkpoint 2 (Share)
explain why?
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31+The Coriolis Effect
http://www.youtube.com/watch?v=Wda7azMvabE
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32+The Coriolis Effect:Playground Visualisation
http://www.youtube.com/watch?v=_36MiCUS1ro
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33+The Coriolis Effect:
http://www.youtube.com/watch?v=__SlJtnpCD8
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34+South Asian Monsoons:Think Buzz Share
pg 103- 104
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Arman Alluwie TP2 SHSS
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?