The main elements of the weather that are measured are-
- Wind (Direction and Speed)
Different instruments are used to measure these different elements of the weather. These are-
Thermometer (Used to measure temperature)
Temperature can be measured in Degrees Celsius and also in Fahrenheit. Thermometers have a bulb at the bottom that is full of Mercury or Alcohol. The mercury rises or falls depending on the temperature.
Weather stations record the temperature in the shade, using a Stevenson’s screen. It contains TWO thermometers, one to record the highest temperature and the other to record the lowest. They then take the average.
To record the Average temperature. Add up all the temperatures of each month and divide by the number of months.
To find the Range of temperature. Take the lowest from the highest.
Two elements are measured. Wind direction and wind speed.
Wind direction is measured with a Wind Vane.If the arrow is pointing to the north, that means it is a Northerly Wind. Winds get their name from the direction they come from. Prevailing winds are winds that are most common to an area. Ireland’s prevailing winds are the South-Westerlies.
Wind speed is measured using an instrument called an anemometer. The Anemometer has little cups on it that rotate when the wind blows. The faster the wind blows the faster the cups turn.
A rain gauge calculates the amount of rain that falls by collecting it in a graduated cylinder. The rain gauge must be left out in the open, above the ground and away from any form of shelter.
and here’s a song to help you remember it all!