DAVID KITAWI SECONDARY SCHOOL TAITA TAVETA COUNTY FORM

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DAVID KITAWI SECONDARY SCHOOL TAITA TAVETA COUNTY FORM ONE WEBQUEST GEOGRAPHY LESSON STUDENT PRESENTATION

DAVID KITAWI SECONDARY SCHOOL TAITA TAVETA COUNTY FORM ONE WEBQUEST GEOGRAPHY LESSON STUDENT PRESENTATION TOPIC: WEATHER SUB-TOPIC: STEVENSONSCREEN

PRESENTERS: v. AMON MGHANGA MWACHANYA -0330 v. MWANASITI WASAI RAMADHAN -0352 v. BETLINAH MGHOI

PRESENTERS: v. AMON MGHANGA MWACHANYA -0330 v. MWANASITI WASAI RAMADHAN -0352 v. BETLINAH MGHOI MADEDO -0334 v. GEORGE RIGGAN MLONGO -0345 v. BEATRICE WAKESHO MWAKISHA -0384

TASK Research on the qualifications of Stevenson screen in relation to its function

TASK Research on the qualifications of Stevenson screen in relation to its function

WEBQUEST LESSON OBJECTIVE: By the end of the webquest, the learner should be able

WEBQUEST LESSON OBJECTIVE: By the end of the webquest, the learner should be able to describe the qualifications of Stevenson screen in relation to its functions.

RESOURCE LINKS QUALIFICATION OF STEVENSON SCREEN http: //weatheronline. co. uk http: //bom. gov. au/climate/edo/temperature

RESOURCE LINKS QUALIFICATION OF STEVENSON SCREEN http: //weatheronline. co. uk http: //bom. gov. au/climate/edo/temperature FUNCTION OF STEVENSON SCREEN http: //slideshare. net/mobile http: //weatheronline. com/stevemsonscreen

FINDINGS: STEVENSON SCREEN is a white wooden box in a weather station which is

FINDINGS: STEVENSON SCREEN is a white wooden box in a weather station which is used to house thermometers and hygrometers. Instruments found in it are: - ØMaximum thermometers ØMinimum thermometers ØSix’s thermometers ØHygrometers (wet and dry bulb thermometers)

PHOTOS OF STEVENSON SCREEN

PHOTOS OF STEVENSON SCREEN

Why is it made of wood? It is made of wood because wood is

Why is it made of wood? It is made of wood because wood is a bad conductor of heat, This prevent overheating in the box hence accurate temperatures are recorded

Why is it painted white? It is painted white to reflect away solar heat,

Why is it painted white? It is painted white to reflect away solar heat, This prevent overheating of the box which may give different temperatures reading as compared to the actual temperatures in the surrounding

Why is made with louvers? It has louvers to allow free circulation of air

Why is made with louvers? It has louvers to allow free circulation of air in and out the box, This prevent accumulation on air in the box which might alter the reading in thermometers

Why is it raised above the ground? It is raised (120 cm) above the

Why is it raised above the ground? It is raised (120 cm) above the ground to prevent terrestrial radiation, This prevent heating of the box by terrestrial radiation as the land losses heat to the atmosphere

FUNCTIONS It houses thermometers which record minimum and maximum temperatures at the weather station

FUNCTIONS It houses thermometers which record minimum and maximum temperatures at the weather station It houses hygrometer which record the amount of humidity at the station

CONCLUSION STEVENSON SCREEN is an important box in the weather station since it houses

CONCLUSION STEVENSON SCREEN is an important box in the weather station since it houses weather instruments hence preventing damages and breakages since most of them are made of glass, It also provides security to the instruments.

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