sound

what is sound??!! Hello world today I’m going to tell you about  sound. The properties of sound are 1.sound travels 2.sound can be reflected 3.sound can be absorbed 4. sound can be modified 5. sound is caused by vibration.  Sound is made up of a lot of little waves. Sound travels pretty slow in the… Read more sound

Light

Hello world today I am going to tell you about light! natural light  and artificial light.  Natural light means it is not man made. Artificial light is man made. An example of natural light is sunlight, fireflies and glow-worms. An example of artificial light is fireworks, light bulbs, glow sticks, oil lamps and candles. Emit… Read more Light