16/12/2019 Light and Sound Energy (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Light and Sound Energy (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. A reflected sound wave is called aEchoRefraction of soundStrange VoicesAll of AboveNone of Above2. Sound is caused byHertzDecibelsFrequencyVibrations3. Most of the light that reaches your eyes is__________ light. Reflection occurs when light strikes a surface and _________ off.Reflected and bouncesOld and bouncesBounced and refractionRefraction and bouncesNew and bounces4. Sound is a disturbance that travels through a medium as a transverse wave.TrueFalse5. Humans can see all wavelengths of light BlueWhiteRedBlack6. Most materials _______ the light falling on them but some materials allow light to pass through them. Refraction happens when light passes through glass, water, light plastic, and other_______ objects.Translucent and reflectReflect and transparentOpaque and reflectReflect and opaqueReflect and translucent7. The part of the ear that provide us with our sense of balance is the:PinnaOval windowEustachian tubeSemi-circular canals8. What does a wave transfer?WaterAll of AboveEnergySmaller WavesNone of Above9. There are two types of waves to transmit signals. They are ______________ and _____________.All of AboveAM,FMAM,BMAM,MANone of Above10. A curved piece of glass or other transparent material that is used to reflect light.MiragePrismNone of AboveAll of AboveLens11. Which one will REFLECT ALL the light that hits it?The sunStarsA mirrorA red dress12. Which is the definition of light?What all matter is made up ofThe movement of air particles hitting your eardrumA force that all objects with mass haveA type of energy (electromagnetic) that we can detect with our retina13. Which of the following lists rates the materiasl in order from the best sound carrier to the worst sound carrier?Wood, water, airWood, air, waterWater, wood, airAir, water, wood14. Which of the three sounds below has the highest frequency? A B C ABNone of the aboveC15. Mechanical waves need a __________ to travel through.MediumAll of AboveWaveNone of AboveAir16. An ultrasound pulse is reflected from a shark that is swimming 750 metres below the water surface. Given that the speed of sound in water is 1500 metres per second, the time delay between sending and receiving this pulse is:2 seconds1 second0.5 seconds3 seconds17. A material that reflects or absorbs or color that strikes it is________TransparentOpaqueTranslucentAll of AboveNone of Above18. When light bounces of an uneven surface, the result is called______RefractionDiffuse ReflectionNone of AboveRegular ReflectionAll of Above19. Your new question!20. An object is _________ if it gives off it own light. All of AboveIlluminatedNone of AboveWeirdLuminous21 out of 20Time is Up!