Filters - The tools which allow only some lights to pass through are called, Sound - The type of energy which we can hear is called energy, Vibrations - Sound is produced due to , Sun - The biggest source of light energy on the Earth is the , Brain - What we hear is decided by this part of our body, Water - Dolphins can hear sounds through, Shadows - This is formed when an object blocks light, Pitch - Quality of sounds is called its, Ear drum - The part of our ears helping us in hearing are called the, Reflect - The other name of bouncing off of light is to,

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