Cry of Jelicuon
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Check Your Understanding

Check Your Understanding: Waves & Sound

A mix of conceptual and problem-solving items covering the whole module. Try each one yourself first, then reveal the answer to check. Problem items show the final answer only — work the full solution in your science journal.

Festival context —Live drumlines and musical instruments setting the tempo and emotional tone of the Cry of Jelicuon reenactment — performers move in direct response to the sound

S8FE-IVa-25Grade 8 · Quarter 4Sound Waves, Frequency & Pitch
1
Conceptual

A festival bass drum sends sound across the plaza. Is this a transverse or a longitudinal wave, and what does that mean for the air molecules?

2
Conceptual

The drummer strikes the same drum harder, but at the same tempo. Does the pitch change? Which wave property changed instead?

3
Problem Solving

The festival trumpet plays a note at 440 Hz. Using the speed of sound in air, what is the wavelength of its sound?

v = 343 m/s, f = 440 Hz

4
Problem Solving

A festival sound wave is measured to be 1.72 m long in air. What is its frequency?

v = 343 m/s, λ = 1.72 m

5
Conceptual

Why do festival organizers store the brass horns and drums in a dry, cool room after the celebration ends?

Try each item on your own first — reveal the answer only to check your work.

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