5 What does a anemometer measure? 3. Anemometer – measures wind speed.
6 What does a hygrometer measure? 4. Hygrometer – measures humidity = amount of water vapor in the air.
7 hygrometer uses two basic mercury thermometers, one with a wet bulb one with a dry bulb. Evaporation from the water on the wet bulb causes its temperature reading to drop, causing it to show a lower temperature than the dry bulb. Relative humidity is calculated by comparing the readings using a calculation table that compares the ambient temperature (the temperature given by the dry bulb) to the difference in temperatures between the two thermometers.
8 What does a weather vane measure? 5. weather vane – measures wind direction