iGCSE Physics - 3.4 Sound SUPPLEMENT

**This Powerpoint specifically covers all criteria for –
Unit 3.4 Sound SUPPLEMENT
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Describe compression and rarefaction

Know that, in general, sound travels faster in solids than in liquids and faster in liquids than in gases

Describe the uses of ultrasound in nondestructive testing of materials, medical
scanning of soft tissue and sonar including calculation of depth or distance from time and wave speed

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version which can be used as a handout for students and can be easily uploaded to any school’s VLE system.
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