The sun,earth,moon,light and shadow

I KNOWWe need light to seeThe sun is a natural source of lightThe moon does not have its own light. It appears bright because light from the sun falls on it.The sun,earth,moon,light and shadow

Why do we need light ?We need light for our eyes to see things. At night we cannot see things in a room unless we switch on the light. We see an object only when light that falls on it bounces back and enters our eye.Example;

THE MOONThe moon is the brightest object in the night sky, but it does not have light of its own. The moon appears bright because light from the sun falls on it. The moon is the Earths natural satellite. It revolves around the earth as well as rotates on its axis.Example;

Formation of shadowAn object which does not let light pass through is called an o[aque object. We cannot see through an opaque object. Wood, stone and metals are opaque materials.When an opaque object comes in the path of light, light cannot travel further, it gets stopped. When light is stopped in its path by an object, a dark area is formed on a surface behind the object. This dark area is called shadow.

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