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| Define "sound" - | ANSWER: "Sound" is a physical stimulus for hearing. |
| Define "frequency" - | ANSWER: "Frequency" is the number of physical viabrations of sound per second. |
| Define "sound waves" - | ANSWER: The energy of vibrations of sound that travel in up and down motion are called "sound waves". |
| Define "amplitude" - | ANSWER: "Amplitude" is the degree of motion of air molecules in a sound wave; the higher the degree of motion the high the sound to the ear drum. |
| Define "intensity" - | ANSWER: "Intensity" is the distance that sound can travel; the higher the energy in a soundwave the higher the intensity (meaning the farther the sound will carry). |
| Is sound effected by temperature ? | ANSWER: Yes, sound is affected by temperature. |
| Define "refraction" - | ANSWER: Sound normally travels in a "straight line", but can bend when it is affected by other physical phenomena (such as temperature and wind) and this is know as the "refraction" of sound. |
| Define "reflection" - | ANSWER: When sound waves bounce off other objects and reverse course, this is known as the "reflection" of sound waves (can be referred to under certain circumstances as an "echo"). |
| Define "defraction" - | ANSWER: When sound waves have to bend to go through same opening or corners, this is known as the "defraction" of sound waves. |
| Define "interference" - | ANSWER: When two or move sound waves bump into each other or overlap and cause their sound messages to become distorted, this is known as "interference". |
| Define the "crest" of a sound wave - | ANSWER: The "crest" of the sound wave is its high point for a particular wave of sound energy. |
| Define the "trough" of a sound wave - | ANSWER: The "trough" of a sound wave is its lowest point for a particular wave of sound. |
| What is the "compression" of a sound wave ? | ANSWER: The "compression" of a sound wave is how tight or lose a particular wave of sound energy is. |
| Define "wave lenght" - | ANSWER: The "wave lenght" is how long or short the measurement of a particular wave of sound energy is. |
| The lower the frequency of a sound wave the ______________ ? | ANSWER: The lower the frequency of a sound wave the lower the soound. |
| After receiving a sound wave, what part of the ear vibrates and sends messages to the brain ? | ANSWER: The part of the ear responsible for the reception and passing on of sound waves is the "anvil". |
| How does "density" affect sound ? | ANSWER: The more dense an object (for example: wood) the harder it is for sound waves of energy to pass through it. |
| Define "decibel" - | ANSWER: "Decibel" is how humans perceive the intensity of sound. |
| Define "overtone" - | ANSWER: "Overtone" is a combination of sounds and pitches that follows a specific pattern. |
| What is the study of "echolocation" ? | ANSWER: "Echolocation" is the study of sound. |
| Define "eardrum" - | ANSWER: The "eardrum" is filled with fluid and contains tiny hair cells that vibrate. |
| Define "ultrasonic" - | ANSWER: A change in pitch or wave frequency due to a moving wave source is called "ultrasonic". |
| Define "pitch" - | ANSWER: "Pitch" is the frequency of sound waves or the loudness or softness of the sound. |
| Define "Doppler effect" - | ANSWER: The "Doppler effect" is the change of sound as ithe distance of its source increases or decreases from the receiving source (for example: a police car with its siren on, as it comes nearer the louder it gets or as it gets farther the softer it gets). |
| Define the "quality" of sound - | ANSWER: The "quality of sound" is how clear the sound is when it is received, with less interfernce and thus less distortion, the clearer the quality will be. |
