Lesson 15 of 84 · Waves
Experiment⭐ 30 XPSound: Pitch and Volume
Sound: Pitch and Volume.
🎯 Your mission
Set it up. Test it. Be amazed.
⚡ The twist
Nature loves to surprise the careful watcher.
Mind = Blown
🔬 The more you look, the more nature shows you.
Make a hypothesis first
Before you start: write down what you think will happen, and why.
What You'll Learn
Sound waves have properties including amplitude (loudness), frequency (pitch), and wavelength. Higher frequency means higher pitch. Greater amplitude means louder sound.
Key Words
- criteria
- iteration
Materials Needed
- aluminum foil
- ruler
- markers
- popsicle sticks
- pennies
Safety First
- Clean up spills immediately to prevent slipping.
Steps
Study the diagram and label the parts you recognize.
Build a working anemometer using paper cups and straws. Calibrate it by counting rotations in a known wind speed.
Observe what happens and describe it in detail.
Record your observations in your science journal with measurements and descriptions.
Check Your Understanding
Question 1
1 of 3Can sound travel through a vacuum?
Where you see this in real life
This shows up in your everyday life more than you'd think.
Stretch Challenge
Try this in real life this week.
Try one experiment in real life this week — even a tiny one.
For the dinner table
“What's the most surprising thing you learned today?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Checkout complete lesson on Waves for 7th Grade
Get the full Waves track as a printable PDF — all lessons, worksheets, and answer keys.