what is light source?, things that can not produce its own light, things that can produce its own light, what is non light source?, things that can produce its own light, things that can not produce its own light, Is the sun a light source?, yes it is, no it is not, is the lamp is light source?, yes it is a light source, no it is not a light source, is a book light source?, yes it is a light source, no it is not a light source, is a candle a non light source?, yes it is, no it is not, why do we need a light to see?, because objects reflect light into our eyes, because light is bright, what happens in a completely dark room?, we can see clearly, we can not see, a shadow is formed when?, light shines, an object blocks the light, wich of these is a light source?, lamp, sun, a shadow is formed when ....... blocks light, object, light, without light objects are...., visible, invisible, wich blocks the light?, water, object, wich one is artificial light?, star, candle, light help us to ......, see, eat
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LIGHT GRADE 1
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