Weather Instruments - SIX`S THERMOMETER.pptx

Geography lesson notes

1. WEATHER INSTRUMENTS SIX`S THERMOMETER BY T J GOMENDO

2. Definition: The Six's Thermometer is a type of liquid-in-glass thermometer used to measure air temperature. It is particularly known for its use in meteorological observations.

3. Characteristics of Six's Thermometer 1. Design: - Typically consists of a glass tube with a bulb at one end. - The bulb contains a colored liquid (usually mercury or alcohol) that expands and contracts with temperature changes. 2. Scale: - The thermometer is marked with a scale, usually in degrees Celsius (°C) and Fahrenheit (°F). - The scale allows for precise readings of temperature.

4. Characteristics of Six's Thermometer 3. Graduation: - The scale is graduated, with each division representing a specific temperature increment (e.g., 1°C or 2°F). 4. Sensitivity: - The design allows for quick response to temperature changes, making it useful for both indoor and outdoor measurements. 5. Mounting: - Often mounted on a wooden or metal base for stability and ease of reading.

5. How the Six's Thermometer Works 1. Principle of Operation: - The thermometer operates on the principle that liquids expand when heated and contract when cooled. 2. Temperature Measurement: - When the temperature rises, the liquid in the bulb expands, moving up the tube. - Conversely, when the temperature drops, the liquid contracts and moves down the tube. 3. Reading the Temperature: - The level of the liquid in the tube corresponds to a specific temperature on the scale. - To read the temperature, students can align their eye level with the meniscus (the curve of the liquid surface) to get an accurate measurement.

6. CALCULATIONS

7. Calculate the Temperature Range

8. MARONDERA

9. MARONDERA

10. Study Fig. 3.1, which shows information about the weather recorded in Manilla, Australia, in October 2018.

11. ( i ) What was the cloud cover at Manilla on 12 October? ......................................................... oktas [1] (ii) Identify from Fig. 3.1: the date which had most rainfall ......................................................... the date with the smallest range of temperature. ..................................................... [2]