light, A form of energy that allows us to see., reflection, When light bounces off a surface., absorption, When a material takes in light energy instead of reflecting it., TRANSPARENT, A material that lets almost all light pass through., TRANSLUCENT, A material that lets some light through but scatters it., OPAQUE, A material that blocks light completely., light source, An object that produces its own light., Shadow, A dark shape formed when light is blocked., Refraction, the bending of light as it passes from one transparent material into another

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