Junior Vocab
The Magic of Sensors
sensorssensorsignalmovement, so they can send a that tells the light to switch on. A checks one thing, like how hot, how bright, or how close something is, then gives a simple signal a machine can use. are watching things like light orHave you seen a porch light turn on by itself when it gets dark or someone walks by? That happens because
Examples of Sensors
sensorsthermometer is a sensor because the liquid moves up or down to show how hot or cold it is. Additionally, a camera has a sensor that turns light into a picture. Next time a door opens by itself at a store, you can remember that are quietly doing the work.A