Grade 2

Sound is a vibration

Feel it, then change it. Part of looking closely.

Sound is a vibration

Feel it, then change it · Alberta Grade 2 · maddyhelps.com

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Hum with a hand on your throat, then put a hand on a speaker. Every sound starts with something shaking. Then try the experiments and write what you noticed.

A ruler twanged over the edge of a table, long end then short end

I predict

I noticed

An elastic band stretched tight, then loose

I predict

I noticed

A spoon on a string, with the string ends in your ears

I predict

I noticed

For the grown-up

Sound is a vibration

Shorter or tighter vibrates faster and sounds higher. The spoon one surprises everyone: sound travels better through the string than through the air, so it sounds like a bell.

Predict before you try — writing what you expect first is the Grade 1 habit that Grade 2 keeps using, and it is the difference between an experiment and a demonstration.

Why this matters is on the looking closely page. More sheets