This video will show the ways people use sound and light to communicate. A traffic light helps pedestrians and drivers on the streets and a lighthouse helps ships to navigate at night or in foggy weather. A doorbell tells us that someone is at the door and emergency services use sound to inform people that they are rushing for help. This video will also be helpful if children need to review the concepts of light and sound. It will remind them about different sources of light and sound, natural and man-made, as well as show what helps us to see and hear.
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