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Sci 7B U4L9 Test
Waves and Electromagnetic Radiation
| Question | Answer |
|---|---|
| Soundproofing materials ________________ sound waves, causing the particles in the material to vibrate and generate heat | Absorb |
| The speed of sound depends on the properties of the medium it travels through. Sound waves therefore travel slowest in a ____________________ | Warm Gas |
| The pitch of a sound wave is determined by its _________________ | Frequency |
| In visible light it is the ____________________ that determines the color that you see. | Color |
| _____________ air molecules move more slowly and respond less readily to the energy of a sound wave | Cooler |
| AM signals travel as changes in amplitude while FM signals travel as changes in ________________ | Frequency |
| You are watching waves at a beach. The waves are about 20 meters apart. This is describing the __________________ of the wave | Wavelength |
| Sonar is used to find or inspect objects by sending out a ________________ wave, that will _______________ off of the object and back to the detector | Sound Reflect |
| The volume of the sound is determined by its ____________________ | Amplitude |
| You are watching waves at a beach. The waves are about 3 meters high. This is describing the __________________ of the wave | Amplitude |
| This type of wave moves side to side. The particles move side to side withe rarefaction and compression. These waves are _________________________ | Longitudinal |
| You are watching waves at a beach. 2 waves wash up on the beach in 10 seconds. This is describing the ________________ of the waves | Frequency |
| The denser the medium the faster a _______________ wave will travel | Sound |
| Electromagnetic waves are made up of vibrating ______________ and magnetic fields. | Electric |
| A clear image on the surface of calm water is ______________ reflection while a blurry image on the surface of choppy water is diffuse reflection. | Regular |
| The interior of the Earth is still hot because radioactive elements release ____________________ as they decay | Heat |
| Henri Becquerel discovered that uranium salts can produce ___________________ without direct sunlight. | X-Rays |
| The principle role of a cell tower is to _______________ signals | Transmit |
| A light ray traveling from air into water will slow down and bend __________________ due to the change in density in the new medium | Downward |
| Radiation Therapy was discovered when Marie Curie noticed that her fingers were ________________ from holding the test tubes | Burned |
| Transparent objects transmit most of the light rays hitting it while opaque objects ________________ most of the light rays hitting it. | Absorb |
| Won the Nobel in Chemistry. Won the Nobel in Physics. Proposed atoms could change into other atoms. Discovered radioactive properties. | Marie Curie |
| A _______________ transmitter sends radio signals | Satellite |
| Defined radioactivity. First woman to receive the Nobel Prize. Received a Nobel Prize in two categories. First female professor in the Faculty of Sciences (Paris). | Marie Curie |
Created by:
scanto
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