MEASURING THE WEATHER

Complete the following table using research from the internet

Weather Instrument Diagram / Image Definition Instructions on how to use the

instrument

Rain Gauge

 

 Also known as a udometer is an instrument that gathers and measures the amount of liquid precipitation over a set period of time. Used by meteorologists and hydrologists.

 It is very simple to use a rain gauge, you place it in the exterior where it will collect the rain, you let it there for the set period of time that you want (a week, a month, a rainfall, etc.) and at the end of that period, you check how much rain was collect it and you note it down.

Maximum-Minimum

Thermometer

 

 Also known as a Six’s Thermometer, it is a thermometer that can measure the maximum and minimum temperatures of a place in a day. Used to measure extreme temps.

 This is possibly the most simple to use, you only place it in the spot where you wish to make the readings, and wait for it to show the results, then take them and note them down.

Hygrometer (Wet and dry

bulb therometer)

 

 These are instruments that are used to measure general humidity in a certain place.

 Nowadays, there are various electronic hygrometers which after taking the reading only note it down and you just have to read it, but in the case of the hair tension ones, instructions are as follows: You must check constantly the hair or wool placed in it, if it is straight, then humidity is high, if not, then it is low, this is how it is measured.

Whirling Psychrometer

 

 This can also be called a “sling psychrometer”, and it is an instrument to measure the humidity and temperature of the air in a certain spot. It works thanks to two separate thermometers, one dry, the other with moist.

 First, you need to fill a small container (this is attached to the Psychrometer), fill it with water and wait for the cloth of one of the thermometers to become damp. Then, take the instrument and swing it from 30 to 50 times over your head, you take the readings of the thermometers after this and you repeat until the results are consistent. The final part is to calculate the wet bulb-depression, and then calculate the relative humidity with this previous data.

Barometer

 

 This instrument is used to measure atmospheric pressure, and it can work with air, water or mercury.

 To use a Barometer you need to first place it in a spot with no radical changes (no direct sunlight for example), then, you set the movable hand according to the set reading (you can find this in the internet), after this, you let it there and see if the other hand changes, if it increases, weather should be good, if not, then it should be expected to be bad.

Anemometer

 

 This instrument is used to measure the wind speed (although some can also measure wind pressure), and it is one of the most common instruments to be found in a weather station.

There are various types of anemometers nowadays, but I will tell you how to use the classic 4-cup one. To use this, you need a stopwatch, and you need to see how many times does the special cup do a full turn in 1 min. You do this 3 times in a row and then divide by 3, getting the average. Then you do the calculation that 1 turn is approximately 1 mile per hour.

Wind Vane

 

 A wind vane or weather vane is an instrument that is placed at the top of high buildings and it is used to see the direction of the wind.

 In order to use a wind vane (or take the lecture to be more specific), you only need to see where is the main arrow pointing at, this will indicate the wind direction according to the cardinal points.