Who's Copying Milo?
Who shouted back?
The story
Milo shouts "Hellooo!" at a faraway cliff, and someone shouts it right back! Nobody could get over to that cliff... so who's copying Milo? The friends imagine they can SEE sounds, then count how long the echo takes from a near cliff and from a far cliff.
What your child learns
- An echo is your own voice coming back: the sound travels to a big hard surface, bounces off it, and returns to you.
- Nobody was copying Milo. The cliff threw his voice back.
- The echo from the near cliff came back on ONE. The far cliff is twice as far, so its echo took twice as long and came back on TWO.
- The farther the sound has to go, the longer you wait for the echo.
Try it together (with a grown-up)
With a grown-up, stand far away from a big wall, away from roads, and CLAP! Can you hear your echo? Count how long it takes to come back.
Fun fact
Bats and dolphins use echoes to find their way. They make clicks and squeaks, then listen for the echoes bouncing back from things around them.
Talk about it after watching
- Who was really copying Milo?
- Why did the echo from the far cliff take longer?
- Where have you heard an echo before?
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Seeing sounds is pretend, but echoes are real: sound bounces off big hard surfaces like cliffs and walls.