--- title: Sound — vibrations, loudness, pitch and echoes — the lesson's questions with trees and pragmatics · World description: The 16 test and exam questions of lesson 54 «Sound — vibrations, loudness, pitch and echoes» of the world course of Mova's primary school, each with its options, Mova's choice and the right answer, every sentence with its dependency tree and pragmatics. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/world/54-sound/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/) / Sound — vibrations, loudness, pitch an… # Sound — vibrations, loudness, pitch and echoes The 16 questions of lesson 54 «Sound — vibrations, loudness, pitch and echoes» of the world course of Mova's primary school with their options, 88 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/world/54-sound/). - [t1](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t1/) — You press your ear to a long wooden table while a friend taps the far end. What do you notice? — wrong ✗ - [t2](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t2/) — A ruler is held at the edge of a desk and twanged. The overhanging part is made shorter. What happens? — right ✓ - [t3](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t3/) — Which is true about loudness? — wrong ✗ - [t4](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t4/) — A shout from the bottom of a canyon is heard again a moment later. Why? — right ✓ - [t5](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t5/) — Why does a gym with bare walls sound more echoey than a classroom with posters, carpets and curtains? — wrong ✗ - [t6](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t6/) — Whales can call to each other across many kilometres of ocean. Which fact helps explain this? — right ✓ - [t7](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t7/) — A tight elastic band gives a high twang. You loosen it. What happens to the note? — wrong ✗ - [t8](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t8/) — If there were no air in a room, could you hear a ringing alarm clock in it? — right ✓ - [t9](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t9/) — why's the big drum go boom n the little one go tick — wrong ✗ - [t10](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t10/) — shouted in the empty hall n heard myself back lol why — wrong ✗ - [t11](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t11/) — my cousin says you can hear explosions in space like in films. true? — wrong ✗ - [t12](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/t12/) — Ben reckons sound can't go through water. right? — right ✓ - [e1](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/e1/) — Which of the following statements most accurately characterises the origin of all sound? — right ✓ · exam - [e2](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/e2/) — Select the response that is consistent with the established facts concerning the propagation of sound through a vacuum. — wrong ✗ · exam - [e3](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/e3/) — It is given that a string is shortened and tightened. Ascertain the consequent alteration in the note produced thereby. — wrong ✗ · exam - [e4](https://md.mova.elamur.ai/free/en/corpora/questions/world/54-sound/e4/) — Identify the principal reason for which curtains and carpets reduce echoes within a room. — right ✓ · exam - ← previous: [53. Light, shadows and colours](https://md.mova.elamur.ai/free/en/corpora/questions/world/53-light/) - next →: [55. Electricity — circuits, switches and safety](https://md.mova.elamur.ai/free/en/corpora/questions/world/55-electricity/) - ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/)