16/12/2019 Light and Sound Energy (STUDY BY TOPICS JUNIOR CLASS) 16/12/2019 0Comments by Gate Academy Welcome to your Light and Sound Energy (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. The bouncing of a sound wave off a surface is Frequency Reflection Pitch Overtone 2. An object is _________ if it gives off it own light. All of Above None of Above Luminous Illuminated Weird 3. The disappearance of a sound wave into a surface is Echo Reflection Absorption Decibel 4. Usually a source of light gives off white light. White light is actually made up of _________ colors. These colors range from red to violet. No All Two One Five 5. Most of the light that reaches your eyes is__________ light. Reflection occurs when light strikes a surface and _________ off. Reflected and bounces Old and bounces Refraction and bounces New and bounces Bounced and refraction 6. What are some of the properties of sound? Intensity None of the above Pitch Loudness All of the above 7. 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 rays Bend and rays Rays and eat Rays and bounce off Rays and bend 8. What does a wave transfer? All of Above None of Above Energy Smaller Waves Water 9. Sound waves are longitudinal waves. False True 10. Transverse waves move the medium in a perpendicular motion to the direction in which the wave is traveling. False True 11. 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. Lightbulbs and televisions Computers anlight bulbs Fire and televisions Fire and computers Fire and lightbulbs 12. Convert 35°C into Kelvin. 308 K 308˚ K 238˚ K 238 K 13. Which is a electromagnetic wave? Gamma Waves None of the above Light Waves Infrared Waves All of Above 14. This table shows the approximate speed of sound in various materials and at different temperatures. Material Speed of sound (m/s) Air (at 0°C) 331 Air (at 18°C) 342 Water 1440 Wood 4500 Steel 5100 Glass 5200 By looking at this data you could conclude that: Sound travels faster at cooler temperatures Sound travels faster through substances that are more dense Sound travels at the same speed through all materials Sound cannot pass through glass 15. In order to travel, sound waves must have Solid Matter Liquid Gas 16. Primary colors combine to make any color. False True 17. What is the material that a wave travels through called? All of Above Water Air Medium None of Above 18. Which one will REFLECT ALL the light that hits it? A red dress A mirror The sun Stars 19. A curved piece of glass or other transparent material that is used to reflect light. All of Above Lens Mirage None of Above Prism 20. Longitudinal waves move the medium in a perpendicular motion to the direction in which the wave is traveling. False True 1 out of 20 Time is Up! Time's up
