Sound and light signals
Sounds and lights can carry messages. An ambulance's siren says 'make way', a school bell says the lesson has begun, a doorbell says someone is at the door. A traffic light tells people to stop or go, a car's indicator says it will turn, a lighthouse warns ships of land. Many signals use both, so that people who can't hear, or can't see, still get the message.
Depth 1 · Foundation
You know that sounds and lights can carry messages, like a siren, a school bell or a traffic light, and what some of them tell us.
Sign in to prove what you know with a short quiz, see how deep you've gone, and earn XP for it.
Sign in with GoogleDepths of understanding
- 1
Foundation
You know that sounds and lights can carry messages, like a siren, a school bell or a traffic light, and what some of them tell us.
Your path here
What's still between you and Sound and light signals, depth 1, in the order you can learn it.
Where it fits
Builds on
This concept