Light eliska and jack

November 25, 2014  |  By  | 

OUR MAIN SORCE OF LIGHT IS THE SUN. The Sun is really a big ball of heat, light, and energy. It gives Earth all the heat we need. THERE ARE TWO TYPES OF LIGHT ARTIFICIAL AND NATURAL. A light bulb is artificial light and the sun is natural light. Both natural and artificial light are important.

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