Water & weather

2007, DVD , 1 videodisc (30 min.) :
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Summary/Review: Learn why we have different seasons, what a rainbow is, why thunder follows lightning, what water is, how oceans were formed, what an ecosystem is and more...
Summary/Review: Learn why we have different seasons, what a rainbow is, why thunder follows lightning, what water is, how oceans were formed, what an ecosystem is and how we benefit from them, what a biosphere is, and much more.
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