Light and sound for the youngest scientists: study cards a grown-up can read aloud, the tricky ones, a practice quiz at three levels — Foundation, On-Level, and Challenge — and a lab where you sort what makes light, lets it through or blocks it, label a drum from the stick to the ear, put six sounds in order from loudest to softest, and graph how a shadow shrinks as the toy moves away from the light. Work here, or print it and use a crayon — both count.
A bell hanging still. It is quiet, because nothing is moving.
Sound is something shaking. No shake, no sound — grab a ringing bell and it goes quiet in your hand, every single time. A BIG shake is loud; a FAST shake is high.
Two things people get wrong
⚠️People often think…
The moon makes its own light.
It bounces the sun’s light, the way a mirror does. Turn the flashlight off in a dark room and the mirror goes dark too — a bouncer has nothing to bounce.
Some things make light. Some only bounce it.
⚠️People often think…
Loud and high mean the same thing.
They are two different shakes. BIG shake is loud; FAST shake is high. A tuba can be loud and low at once, and a whistle can be quiet and high.
Big shake is loud. Fast shake is high.
Shake to hear, light to see
1Watch one
A drum is loud. You want it quieter. What do you change?
Ask what makes the sound: the drum skin shaking.
Loud comes from a BIG shake.
To make it quieter, make the shake smaller — tap it instead of whacking it.
Smaller shake, quieter drum. ✓
2Do one with me
Fill in what light and sound do.
A loud sound comes from a shake that is
The moon does not make light — it
Move closer to the light and the shadow gets
💬One sentence, then you move on
How do you know sound comes from shaking?
3Try one
It is pitch dark. Is your backpack still on the floor?
I want a hint first
You could still trip over it. Nothing left the room — only the light did.
Where this goes
Where this lives
Turning down a speaker, finding a light switch, making shadow puppets, knowing why you can hear the hallway through a door.
One card at a time — tap “Show me” to check yourself, then Next. Start at Foundation; when those feel easy, climb.
Helpful Hints
🪜 Sound and light — the ladder
Every sound starts with something vibrating — shaking fast → a big shake is loud, a fast shake is high → sound goes out through the air and can shake other things → you see a thing only when light reaches it and bounces to your eye → some things let light through, some let a little, some block it and make a shadow → a flashing light or a drum can send a message far away.
Shake to hear. Light to see.
🤝 The whole idea
Sound is a shake you can hear. Light is what you need to see. Both of them travel — that is why you can hear a drum across the gym and see a flashlight across the yard.
Both travel. Both carry a message.
⚠️ Tricky ones
No vibration, no sound. Grab a ringing bell and it stops — every time.
Loud is a BIG shake. High is a FAST shake. They are not the same thing.
The moon and a mirror do NOT make light. They bounce it.
In the dark, things are still there. You just can’t see them until light lands on them.
Closer to the light = BIGGER shadow, not smaller.
🔦 What light does to things — the chart
Hold it up to a flashlight
What you see
The word
Examples
all the light goes through
the beam, and shapes behind it
clear
a window, plastic wrap, clean water
some light gets through
a glow, no clear shapes
cloudy
wax paper, a frosted window, a thin curtain
no light gets through
a shadow behind it
blocks it
cardboard, a wall, your hand
the light comes back
the beam on the ceiling, your own face
bounces it
a mirror, shiny foil, still water
All, some, none — or bounce.
🎯 How the test will ask
A picture of a drum with rice jumping — “why is the rice moving?” (the drum is vibrating).
Pictures of a window, wax paper and a wall — “which one makes a shadow?”
“Which one makes its own light?” (the sun or a flashlight — not the moon).
“Why can’t you see in a dark room?” (no light to bounce into your eye).
“How could you send a message across a field without your voice?” (a light or a drum).
✅ Can you…
Say where every sound comes from?
Tell loud from high, and say which kind of shake makes each?
Name three things that make their own light and one that only bounces it?
Sort things by all, some, or none of the light?
Say what makes a shadow, and how to make it bigger?
Pick your level
Look back at anything you missed — the hint that appeared is exactly what to reread tonight.
How sure did you feel?
Lab
Work like a scientist: label the diagrams, turn the table into a graph, then write a claim with evidence and reasoning. Every lab checks itself on the spot, and hints are free.
Your practice never leaves this device. There is no account and no sign-in. Your work is saved in this browser only, and you can erase it whenever you want.
Your practice record — saved on this device
This is your record of the module on screen — it stays here and goes nowhere. Independent means you got it right on the first tap; supported means you got it after the explain-and-retry, or marked ‘I had it’ on a revealed answer. Both count, and neither is a grade. If your teacher asks, copy the row or show them this screen.
Date
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Topic
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Level
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Independent
0 of 0
Supported
0 of 0
Hints used
0
Cards studied
0
Lab
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Traps met
0
Explained in own words
0
Confidence
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The answer key is for a teacher: it prints only from here, for the unit on screen. Print the study packet prints the study pages and a blank quiz — never the answers.