Anemometer
Anemometer is a tool that measures how fast the wind blows by counting how quickly its cups spin.
A pinwheel stuck in a lump of clay spins when you blow on it. Blow hard and it spins fast. Blow soft and it spins slow. An anemometer works the same way, counting spins to measure wind speed.
Explaining anemometer by grade level
You can make a simple wind tool from paper cups on sticks. When the wind blows, the cups spin around. Strong wind makes the cups spin fast. Slow wind makes the cups turn slowly.
Projects that explore anemometer
An anemometer measures wind speed by counting how quickly its cups spin. In this experiment, you count how many times a colored cup passes you in one minute. More spins mean the wind is pushing the cups faster.
An anemometer captures one piece of the weather puzzle: wind speed. Its spinning cups translate the force of moving air into a number you can record and track. Reading it daily alongside a thermometer, barometer, wind vane, and hygrometer builds a dataset that reveals how wind speed connects to approaching fronts and pressure changes.
The rate at which the cups spin reveals how friction with the ground slows the wind. Mounting four anemometers at different heights on a single pole shows this effect directly — the higher instruments spin faster every time. That pattern maps exactly how ground friction weakens wind closer to the surface.