What is a light source, An object that gives out light, Name one natural source of light, The Sun, Name one artificial source of light, A light bulb, Can we see objects in complete darkness, No, without light we cannot see, Why can we see the Moon, It reflects light from the Sun, How does light travel in air, In straight lines, What happens when light is blocked, A shadow is formed, What happens to the size and sharpness of a shadow when the screen moves closer to the object, The shadow becomes smaller and sharper, What forms when a transparent object blocks light, A very faint shadow or no shadow, What is reflection of light, Light bouncing off a surface, Which surface reflects light better, smooth or rough, Smooth surface, Why can we see ourselves in a mirror, It reflects light into our eyes, What is needed for us to see an object, Light must enter our eyes, Why does a wooden door cast a dark shadow, It is opaque, What should you not do when looking at the Sun, Do not look directly at it

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