O-LevelPhysicsWaves5054/11 · Oct/Nov 2025 · Q181 Mark
The sentences describe sound waves. Three words have been omitted. Sound waves are longitudinal waves that consist of regions of higher pressure called ......1...... and regions of lower pressure called ......2....... An echo occurs when a sound wave is ......3....... Which words complete gaps 1, 2 and 3?
A1
compressions
2
rarefactions
3
reflected
B1
compressions
2
rarefactions
3
refracted
C1
rarefactions
2
compressions
3
refracted
D1
rarefactions
2
compressions
3
reflected
✓ Correct answer
A: 1 compressions 2 rarefactions 3 reflected
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