waves 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: kate167Created on: 02-05-14 19:37 36254871019 Across 1. When an object or substance vibrates, it produces (5) 4. Sound waves and light waves change speed when they pass across the boundary between two substances with different densities, such as air and glass. This causes them to change direction and this effect is (10) 5. the greater the the higher the pitch. (9) 6. HZ (9) 9. measures to top to the middle (10) Down 2. the law of (10) 3. What are waves? (10) 7. We cannot see radiation (5, 3) 8. the greater the the louder the sound (9) 10. radiation can also be used to transmit signals such as mobile phone calls. (5, 5)
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