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 curved piece of glass or other transparent material that is used to reflect light.None of AboveMirageLensAll of AbovePrism2. Select the alternative that lists insulators from the most to the least effective.A windcheater, a cotton T-shirt, a woollen jumper, a parkaA parka, a woollen jumper, a cotton windcheater, a cotton T-shirtA woollen jumper, a cotton windcheater, a parka, a cotton T-shirtA cotton T-shirt, a cotton windcheater, a woollen jumper, a parka3. Light is a form of energy. Light travels from the Sun to the Earth________ and________ are other examples of light on Earth. Often sources of light give off heat.Fire and televisionsComputers anlight bulbsFire and computersFire and lightbulbsLightbulbs and televisions4. When light bounces of an uneven surface, the result is called______None of AboveRegular ReflectionDiffuse ReflectionRefractionAll of Above5. Which of the three sounds below has the highest frequency? A B C CANone of the aboveB6. Which of the following lists rates the materiasl in order from the best sound carrier to the worst sound carrier?Air, water, woodWater, wood, airWood, water, airWood, air, water7. 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:0.5 seconds3 seconds2 seconds1 second8. Which is the definition of light?A type of energy (electromagnetic) that we can detect with our retinaWhat all matter is made up ofThe movement of air particles hitting your eardrumA force that all objects with mass have9. Most of the light that reaches your eyes is__________ light. Reflection occurs when light strikes a surface and _________ off.New and bouncesOld and bouncesBounced and refractionReflected and bouncesRefraction and bounces10. Your new question!11. Usually a source of light gives off white light. White light is actually made up of _________ colors. These colors range from red to violet.OneAllTwoFiveNo12. Sound is a longitudinal wave. This means that its particles:Do not move at allVibrate back and forthMove along with the waveVibrate from side to side13. How high or how low a sound is PitchAbsorptionVolumeReflection14. Light travels at different speeds in different materials. The thicker a material, the _______________ light travels through it. As light travels more slowly it bends more.MoreLessFasterSlower15. All light is made of waves. A _______ is the distance from the top of one wave to the top of the next wave.Top pointDistance lengthHigh pointHigh topWavelength16. What are some of the properties of sound? PitchNone of the aboveIntensityLoudnessAll of the above17. The sound of a flute is produced because:Your fingers vibrate as they cover specific holes.Different-sized columns of air inside the flute vibrate.Air vibrates as it enters the mouthpiece.The air around each hole in the flute vibrates.18. Sound waves are longitudinal waves.TrueFalse19. Light travels in straight lines or ____________. Shadows prove this. Light spreads out from a source in all directions, however it can't_______________. Bounce off and raysRays and eatRays and bendBend and raysRays and bounce off20. If Sam is playing his guitar and wants one of the strings to create a higher pitch, what should he do?Tighten the stringKeep the string the same and use two finger to playLoosen the stringReplace the string with a new one21 out of 20Time is Up!