Tsunami | Disaster Management | Middle School | Science | Khan Academy
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Classification| Understanding Microorganism | Middle School Science | Khan Academy
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Volcanoes | Disaster Management | Middle School | Science | Khan Academy
5:57
Hverfjall Explosion Crater in North Iceland And The Lunar Landing Training Area in 1968
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Forest and Ocean Resources| Natural Resources | Middle School | Science | Khan Academy
27:15
O Conceito Mais Mal Compreendido da Física
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Os fenômenos naturais mais impressionantes do mundo | BBC Earth Science
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Provocamos Uma Avalanche Para Ver Como Elas Funcionam
17:19