The main source of light is ............................. ., Sun, Stars, Moon, Fireworks, It is Not a light source., Sun, Flashlight, Street lights, Moon, It is Not a light source, Sun, Mobile phones, Computer screen, Mirror, It is a light source., Candle, Bread, Water bottle, Book, It is a light source., Fire works, Door, Pencil, Face mask, Light source powered by electricity:, Lamp, Sun, Stars, Pencil, Light source NOT powered by electricity:, Lamp, TV screen, Fire, Street lights, It is a source of light and Heat., Mirror, Moon, Foil, Sun, It is not safe to look directly at the Sun because it can damage our eyes., True, False, Is it safe to look directly at the Sun., True, False.

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