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science vocab testst
| Question | Answer |
|---|---|
| a repeating disturbance or movement that transfers energy through matter or space | wave |
| matter in which a wave travels | medium |
| waver for which the matter in the medium moves back and forth at right angles to the direction the wave travels; has crests a troughs | transverse wave |
| a wave for which the matter in the medium moves back and forth along the direction the wave travels | compressional wave |
| distance between one point on a wave and the nearest point just like it. | wavelength |
| the number of wavelengths that pass a fixed point each second; is expressed in hertz (Hz) | frequency |
| the amount of time it takes one wavelength to pass a fixed point; is expressed in seconds. | period |
| a measure of the energy carried by a wave | amplitude |
| the bending of a wave as it changes speed in moving from one medium to another | refraction |
| the bending of waves around an obstacle; can also occur when waves pass through a narrow opening | diffraction |
| occurs when two or more waves overlap and combine to form a new wave | interference |
| a wave pattern that forms when waves of equal wavelength and amplitude, but traveling in opposite direction, interfere with each other; has points called nodes that don't move | standing wave |
| the process by which an object is made to vibrate by absorbing energy as its natural frequencies. | resonance |
| tough membrane in the outer ear that is about 0.1mm thick and transmits sound vibrations into the middle ear. | eardrum |
| spiral-shaped, fluid-filled structure in the inner ear that converts sound waves to nerve impulses | cochlea |
| amount of energy that flows through a certain area in a specific amount of time | intensity |
| unit for sound intensity; abbreviated as dB | decibel |
| how low or high a sound seems; related to the frequency of sound waves | pitch |
| sound waves with frequencies above 20,000 | ultrasonic |
| change in pitch or frequency that occurs when a source of a sound is moving relative to a listener | Doppler effect |
| difference between sound having the same pitch and loudness | sound quality |
| the loss of electrons from the atoms of a substance | overtone |
| hollow, air-filled chamber that amplifies sound when the air inside it vibrates | resonator |
| the study of sound | acoustics |
| process in which objects are located by emitting sounds and interpreting sound waves that are reflected. | echolocation |
| system that uses the reflection of sound waves to detect objects underwater | sonar |
| waves created by vibrating electric charges, can travel through a vacuum or through matter, and have a wide variety of frequencies and wavelengths | electromagnetic wave |
| particle that electromagnetic waves sometimes behave like; has energy that increases as the frequency of the electromagnetic wave increases | photon |
| specific frequencies that a radio station is assigned and uses to broadcast signals | carrier wave |
| sealed vacuum tube that produces one or more beams of electrons that produce an image when they strike the coating on the inside of a TV screen | cathode-ray tube |
| device that transmits one radio signal and receives another radio signal at the same time, allowing a cordless phone user to talk and listen at the same time | transceiver |
| a system of satellites and ground monitoring stations that enable a receiver to determine its location at or above Earth's surface. | GPS (Global positioning system) |
Created by:
missyprissi96
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