Science Secrets · Drawing 13 of 40
Hello, Echo!
Light and Sound
In some places, you call out and hear your voice come back. The sound bounces off a surface and returns to you. That returning sound, heard a moment later, is called an echo.
Did you know?
Sound takes time to travel.
Look together
Which surface might reflect sound here?
An idea to try
With an adult, compare a gentle voice in two rooms. Listen for differences without shouting.
For the adult reading along
A little more to discover
A distinct echo requires enough delay. Reverberation combines closely spaced reflections. The museum scene shows a reflecting surface without guaranteeing an echo in every room.
Sources and illustration notes (1)
Simplified scene and shapes. Models, imagined comparisons and enlargements do not preserve all real measurements.
These links lead to other websites. Explore them with an adult. References identify the institution and the related lesson; some linked pages are in French.
- Exploratorium: Echo TubeSound travels along a tube, reflects from its far end and returns after a perceptible delay as an echo.
Page prepared on October 12, 2026. Illustrations are simplified for colouring.
This drawing is from the book Science Secrets to Colour
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