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Science Ch. 2 Ques.
Lessons 1-5 questions and answers
| Question | Answer |
|---|---|
| What is sound? | A disturbance that travels through a medium as a longitudinal wave. |
| How do sound waves travel? | As a longitudinal wave. |
| Can sound waves diffract? | Yes. |
| What factors affect the speed of sound? | Temperature, stiffness, and density. |
| Does a sound wave travel slower or faster in a lower temperature. | Slower. |
| Does a sound wave travel faster in a stiffer medium? | Yes. |
| Which are stiffer, solids, liquids, or gases? | Solids. |
| Does sound travel faster in in a denser material? | No. |
| What affects pitch? | The frequency of the sound wave. |
| What is frequency measured in? | Hertz (Hz). |
| What affects loudness? | The energy and intensity of the sound wave. |
| When the amplitude is faster what happens? | The more energy it has. |
| What does a sound do as it moves away from its source. | The intensity weakens and it spreads out. |
| What is loudness measured in? | Decibels (dB). |
| What causes the Doppler effect? | The motion of the source causes the waves to either get closer together or spread out. |
| People behind the firetruck hear a (lower/higher) pitch than the firefighters in the truck hear. | Lower. |
| People standing in front of the firetruck here (lower/higher) pitch than the firefighters in the truck hear. | Higher. |
| What determines sound quality? | The blending of a fundamental tone with its overtones. |
| What is the lowest natural frequency called? | The fundamental tone. |
| What is the highest natural frequency called? | The overtone. |
| What happens when you shorten a string or air column? | The pitch gets higher. |
| What are the three groups of musical instruments? | Stringed, percussion, and wind. |
| How do your ears work? | It gathers sound waves and sends information about the sound to your brain. |
| What does the outer ear do? | It collects sound waves and directs them into the ear canal. |
| What does the middle ear do? | It contains the hammer, anvil, and stirrup. |
| What does the inner ear do? | It contains the cochlea, which sends messages to the brain about sounds felt by the hair cells in the cochlea. |
| What are the main causes of hearing loss? | The eardrum being punctured or damaged, extended exposure to loud sounds, and hair cells in the cochlea dying and not growing back. |
| Which animals use echolocation? | Dolphins and bats. |
| How do people use ultrasound technology? | Observing things they can't see directly. |
| Distance = | Speed of sound x Time |
| What device makes sonograms? | An ultrasound imaging device. |
Created by:
KiraZ22
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