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1stYearSound
Sound
| Question | Answer |
|---|---|
| How is sound produced? | By vibrations. |
| What part of your body vibrates to let you speak? | Vocal cords. |
| What is the term used to describe sounds as low or high? | Pitch. |
| What happens to the sound of a bell when all gases are removed? | There is no sound to be heard. |
| When there are no gas particles, what has been created? | A vacuum. |
| Which animals can use sound to communicate under water? | Dolphins and whales. |
| How does sound travel through a solid, liquid or gas? | Particles collide and pass on sound vibrations. |
| Why does sound travel quickest through a solid? | The particles are closer together. |
| Space is often described as a vacuum. Does sound travel quickly or slowly through space? | Slowly. |
| The waves in high pitched sounds are c_______ t________. | close together. |
| What is the amplitude? | The height of a sound wave from the middle of the wave to the top. OR, the middle of a wave to the bottom. |
| Do loud sounds have a small or large amplitude? | Large. |
| Close together waves mean a h______ f_______. | high frequency. |
| The top of a wave is called a c______ and the bottom of a wave is the t_______. | crest and trough |
| What is the frequency? | The number of waves that pass a point in one second. |
| What are the units of frequency? | Hertz. |
| What are the names of the small bones in the ear drum? | Hammer, anvil and stirrup |
| The snail-shaped cochlea contains l_______. | Liquid. |
| The liquid in the cochlea vibrates against h______ c_____. | Hair cells. |
| What do the hair cells do? | Send electrical signals along nerves to the brain. |
| What is the normal human hearing range in hertz? | 20 Hz to 20,000 Hz. |
| Loudness in sound is measured in units call d______. | Decibels. |
| Which two letters are used as the symbol of the Decibel? | dB. |
| What are sound waves with a frequency above 20,000 Hz called? | Ultrasound / ultrasonic sound waves. |
| What might ultrasound be used for in a hospital? | Ultrasounds of babies in a mother's womb. |
| What might ultrasound be used for in a shipyard? | Finding and checking defects in a ship's hull. |
| Which devices use ultrasound to map sea beds? | Sonar. |
| True or false, ultrasound is used to clean jewellery. | True. |
| True or false, ultrasonic toothbrushes can be used to remove plaque and clean teeth. | True. |
| Name two ways in which a dolphin uses sound. | 1) To communicate with other dolphins. 2) To herd fish shoals into locations for an attack. 3) To stun and even kill fish. 4) To "see" their surroundings using echolocation - like a radar. |
Created by:
DrLEC121
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