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06   Chapter 11   Weather Climate
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06 Chapter 11 Weather Climate

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Transcript

  • 1. CHAPTER 11 WEATHER AND CLIMATE
  • 2. Let’s think about Singapore
  • 3.  
  • 4.  
  • 5.  
  • 6. Weather Is All Around Us
    • Meteorologists are people who study the atmosphere
    • Weather is the condition of the atmosphere at a particular place over a short period of time
    • Climate refers to the weather pattern of a place over a long period of time, usually 30 years or more
    • The basic elements of weather and climate:
    • Temperature
    • Rainfall
    • Wind
  • 7. Temperature
    • Temperature refers to the degree of hotness or coldness of the air
    • It varies throughout the day in a place
    • The temperature rises and falls as the Earth rotates from west to east (seasons)
    • Places nearer the Equator are warmer throughout the year than places farther away
  • 8. Temperature
    • The temperature rises during the day and falls at night
    • It also varies from place to place
    • Temperature gets cooler as we go to higher grounds
  • 9. Altitude
    • Refers to the height of the land
    • Warm air rises – this air cools as it rises and thus temperature decreases as we increase with height
    • Thus, temperature decreases with increasing height
  • 10.  
  • 11. Latitude
    • Places near the earth’s Equator (e.g.: Singapore, Malaysia) receive a higher concentration of Sun’s rays and thus more sunshine
    • Places further away from the Equator (North pole, South pole) receive a lower concentration of sunshine as the sun’s rays are spread over a larger area.
    • Thus that is why places further away from the equator are cooler.
  • 12.  
  • 13. Measuring Temperature
    • Air temperature is measured with a thermometer
    • The scale is in degree Celsius ( º C)
    • Daily maximum temperature refers to the highest temperature reading for the day
    • Daily minimum temperature refers to the lowest temperature reading for the day
    Glass tube Mercury or alcohol
  • 14. Calculating Temperatures
    • The mean daily temperature is the average temperature of a place on any one day
    Formula Mean daily temperature = Daily maximum Daily minimum temperature + temperature 2
  • 15. Calculating Temperatures
    • The daily temperature range is the difference between the maximum and minimum temperatures recorded in a day
    Formula Daily temperature range = Daily maximum Daily minimum temperature - temperature
  • 16. Calculating Temperatures
    • The mean monthly temperature is the average temperature of a place in a month
    Formula Mean monthly temperature = Sum of mean daily temperatures for the month Number of days in the month
  • 17. Calculating Temperatures
    • The mean annual temperature is the average temperature in a place within a year
    Formula Mean annual temperature = Sum of mean monthly temperatures in the year 12
  • 18. Calculating Temperatures
    • The annual temperature range is the difference between the maximum and minimum mean monthly temperatures recorded in a year
    Formula Annual temperature range = Maximum Minimum mean monthly - mean monthly temperature temperature