Presentation on theme: "Geography Sec 1 E learning Lesson"— Presentation transcript:
1Geography Sec 1 E learning Lesson Weather and Climate
2What we will cover…What is weather and what is climate? Their difference?Elements of climate and weather (Temperature and RainfallHow do we measure temperature and rainfall?Different types of major climates.
3What is Weather and Climate? Weather is defined as the condition of a place over a short period of time.Climate refers to the weather pattern of a place over a long period of time.
4How do you determine weather and climate? Use ofTemperatureRainfallWind
5Temperature Defined as the degree of hotness or coldness of the air It varies:Throughout the day (eg. Cooler in the early morning and hot in the afternoon)
6TemperatureThere is a difference between temperatures at the equator and polesIt is hotter near the equator then the poles
8Temperature The height of land (High mountain to lowland) As you go higher, it gets colder. As you get closer to the surface, it gets warmer. This is because air is warmest at the surface
9Measuring Temperature Temperature can be measured in different ways.You use a THERMOMETER to measure temperature.First measurement: Maximum Temperature (high) and Minimum Temperature (low).
10Calculating Temperature Mean Daily Temperature(Daily Max. Temperature + Daily Min.Temperature) ÷ 2Daily Temperature RangeDaily Max. Temperature – Daily Min. TemperatureMean Monthly TemperatureSum of mean daily temperature for the month ÷ Number days in month.
11Calculating Temperature Mean ANNUAL temperatureSum of monthly temperatures in the year ÷ 12Annual temperature rangeMax. mean monthly temperature – Min. monthly temperature
13Stevenson’s vital stats It is a wooden box with louvers (Openings)rculate for the air to circulate.The roof is made of double layers to protect the instrument from the direct rays of the sunIt is painted white to reflect the heat from the sunThe box stands on four legs about 1 meter above the ground.
17Rain GaugeIt is made up of 5 parts (an outer casing, a copper cylinder, a glass bottle, a funnel and a separate measuring cylinder)
18Measuring Rainfall Measured in millimeters (mm) or centimeters (cm) Rainwater collected after 24 hours is emptied and measured. This is called daily rainfall.Monthly Rainfall refers to rainfall in a monthAnnual Rainfall refers to rainfall in a year
21Wind Wind is the movement of air from one place to another. This is due to difference in air pressure caused by heat.
22Measuring WindWe use a Wind Vane to record the direction of the wind.
23Major Types of climate Tropical Climate It lies on between the equator and the tropic of cancer and capricorn.The sun’s rays are more intense at or near the equatorExperience high temperatures ranging from 20ºC to 30ºCReceives same amount of energy all year roundHas high annual rainfall ranging from 1000mm to 2000mm or more.Hot and wet climateExamples???
26Major Types of climate Temperate Climate Lie between Tropic of Cancer and Arctic Circle, and Tropic of Capricorn and Antarctic CircleExperience four seasons every year: Spring, Summer, Autumn and WinterReceive different amounts of sunlight in different periods of the year.Moderate temperatures and moderate rainfall throughout the yearExamples???
29Major Types of climate Polar Climate Lies between Arctic Circle and North Pole, and Antarctic Circle and South Pole.Experience summer and winterFrom March to September: North Pole experience six months of sun. From October to February: South Pole experience six months of sunVery Dry because of lack of water vapourExamples???