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7L
Key Stage 3 Science
| Question | Answer |
|---|---|
| How is sound produced? | By objects vibrating. Answer must include the word “Vibration”. |
| What is the range of frequencies that humans can hear? | 20 Hz – 20 000 Hz |
| What is an oscilloscope? | A scientific instrument that shows images of waves on a screen / shows the trace of a wave. |
| Draw a wave with a very high amplitude. | The waves should clearly be high. The number of waves DOES NOT MATTER. |
| What is the name for the three bones in the ear? | Hammer, Anvil and Stirrup |
| What is the unit for frequency? | Hertz (Hz) |
| What is the word used to describe how tall the wave is? | Amplitude. |
| How does the frequency of a sound link to the pitch? | The higher the frequency the higher the pitch, or vice versa. |
| What is a vacuum? | An area where there is no particles / that is completely empty space. |
| What is the function of the eardrum? | It detects sound waves by vibrating when a sound wave hits it. |
| What is the name of the part of a microphone that detects sound waves? | ( metal) diaphragm |
| There are two tuning prongs: one is very short and one is very long. Which one will produce a higher pitched sound? | The short one. |
| What two things do sound waves transfer? | Energy and Motion (movement, vibration) |
| What is the amplitude of a wave? | How loud it is / how tall the wave is. |
| Draw a wave with a low frequency. | Should include only one or two waves in this space. |
| Is the frequency of a sound is very high, what does this tell you about the pitch? | It is also very high. |
| What is the function of the ossicles? | To amplify vibrations detected by the ear drum and pass them on to the cochlea. |
| What is the name for an area that contains no particles? | Vacuum. |
| What is an echo? | When sound waves are reflected back off of a surface and travel back to the source of the sound wave. |
| What is the order that sound travels through the ear? | Eardrum, ear canal, ossicles, cochlea, auditory nerve. |
| Why do sound waves travel more easily in solids? | Because the particles are close together so it is easier for the vibrations to be passed to neighbouring particles. |
| What is ultrasound? | Waves that have a frequency above the human range of hearing / above 20 000 Hz. |
| Name two uses of sound waves. | Any two from: cleaning objects, ultrasound scans, sonar, echolocation, healing / physiotherapy. |
| What is transmission? | When a sound wave passes through a medium / through an object. |
| Define "amplitude" | The maximum vibration, measured from the middle position of the wave |
| Define "frequency" | Number of waves produced per second, in Hertz |
| Define "wavelength" | Distance between two corresponding points on a wave. Measured in metres. |
| Define "vacuum" | A space with no particles in it |
| Define "resting point" | The mid-point of a wave vibration |
| Define "pitch" of a sound wave | How high or low the sound is. A high pitch has a high frequency. |
| Define "volume" of a sound wave | How loud or quiet a sound is. A high volume has a high amplitude. |
| State the unit of volume of a sound | Decibels (dB) |
| State the speed of sound in air | 330m/s |
| Name the six parts of the ear | Ear drum, bones, cochlea, auditory nerve, semi-circular canals, pinner |
| Name the three bones in the middle ear | Hammer, anvil, stirrup |
| State the function of the ear drum | Thin layer of membrane that picks up the vibrations of sounds waves |
| State the function of the hammer, anvil and stirrup | Amplify the vibrations |
| State the function of the cochlea | Long coiled tube filled with liquid that picks up vibrations and changes them to electrical signals |
| State the function of the auditory nerve | Carries signals from the ear to the brain |
| State the function of the semi-circular canals | Detect movement in the head and help with balance |
| State the function of the pinner | The outer ear; directs vibrations into the ear |
| Define "ultrasound" | Sound waves with frequency higher than the auditory range |
| Define "auditory range" | The range of frequencies that an animal can hear (for humans 20Hz to 20000Hz) |
Created by:
Davenant Foundation School
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