1. WEATHER INSTRUMENTS
SHS SCIENCE 10

2. THERMOMETERS
A thermometer is a devise used to measure temperature.

3. The old…a Galileo thermometer….

4. A newer one….

5. What units do we read a thermometer in?
The digital look…
What units do we read a thermometer in?

6. BAROMETERS
A barometer is a devise used to measure air pressure.

7. Barometers have different looks…..

8. It is read in units of millibars (mb) or thousandths of a bar.
The original….
It is read in units of millibars (mb) or thousandths of a bar.
One bar is Pa (Pascals).

9. Psychrometers
Measures relative humidity based on the effects of evaporation.
It is measured as a percentage (%).

10. Psychrometers
To use, you must hold the handle and swing rapidly in a circle.
This measures a dry-bulb temperature.
There are two thermometers:
Dry bulb
Wet bulb.

11. ANEMOMETERS
An anemometer is a devise used to measure wind speed (km/h).

14. HYGROMETER
A hygrometer is a weather instrument used to measure relative humidity (how much water vapor is present in the air).
It is measured as a percentage (%).

15. A RAIN GAUGE
A rain gauge is a weather instrument which measures the amount of rain which falls.
Usually reported as inches or centimeters.