| Term | Definition |
|---|
| Wave | a way of transferring energy from one place to another without matter being transferred to another place. |
| Peak | the highest point of a wave. |
| Wavelength | the distance between two peaks in a wave. |
| Amplitude | the height of a wave as measured from the midline to the length. |
| Medium | The matter through which energy waves travel. |
| Frequency | The number of wave peaks that pass by a given point every second. |
| Pitch | The highness or lowness of a sound as determined by the wave frequency. |
| light & sound | ________ and ___________ travel as waves. |
| energy | Waves transfer ___________. |
| Medium | Light does not require a ____________. |
| Medium | Sound does require a __________. |
| reflection, refraction & absorbtion | Light and sound interact with matter in specific ways such as _______, _________ & __________. |
| communication | Light and sound can be used for ______. |
| gas like air, liquid like water or solid like a door. | list three examples of mediums. |
| Transverse wave | A wave in which the vibration is side to side or up and down. |
| Longitudinal wave | A wave in which the vibration is forward ad backward. |
| Visible spectrum | The wave length or frequencies of light that can be seen, including the color of the rainbow. |
| Audio spectrum | the frequencies or wavelengths of sound that can be heard, including the lowest pitch to the highest pitch. |
| Light | _____travels as a transverse wave. |
| Sound | ______ travels as a longitudinal wave. |
| Transverse waves | what do you call waves that move from side to side? |
| Logitudinal waves | ____ waves that move forward and backward. |
| sound | when you increase the aplitude of a sound wave, you also increase its ____. |
| sound | when you decrease the amplitude of a sound wave, you also decrease its ____. |
| visible spectrum | Wavelengths that can be seen are within the ______ ________. |
| Electromagnetic Radiation | a form of wave energy that has both electrical and magnetic properties. |
| Electromagnetic Spectrum | the entire wavelength range of electromagnetic radiation. |
| xrays, microwave & radio waves | List 3 examples of electromagnetic radiation. |
| sun, stars and ground | electromagnetic radiation is given off by 3 things... |
| Ultraviolet Rays | the part of the electromagnetic spectrum that sun screen protects us from. |
| radio waves, infrared rays, visible light, ultravioilet rays, x-rays, gamma rays | List 6 parts of the electromagnetic spectrum. |
| transparent | describles materials that light passes through easily |
| translucent | describes materials that some light passes through, producing blurred images. |
| opaque | describles materials that light does not pass through. |
| refract | to bend light or sound waves as they pass through different mediums. |
| focus | to bring energy to a point. |
| convex lens | a lens that focuses light |
| concave lens | a lens that causes light to spread out |
| porous | describles materials full of tiny openings. |
| transmitter | a device that converts information into a signal |
| receiver | a device that receives a signal and converts it to information. |
| amplify | to increase the volume of a sound |
| radio spectrum | the wavelengths used in communication, including radio and television. |
| Morse Code | One famous code used for communication is called _____. |
| communication | ____ is the ability to send, receive and understand messages. |
| electrical signals | _____ are used to communicate over long distance. |
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