A WIND VANE is an instrument that determines the direction from which the wind is blowing.
An ANEMOMETER measures wind speed. The cups catch the wind, turning a dial attached to the instrument. The dial shows the wind speed.
A BAROMETR is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather.
THERMOMETERS measure temperature using either a bulb or a special spring in which a physical change occurs with temperature and is displayed on the scale of the device.
