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Hipervinculo Química
It doesn't take a degree in chemistry to know that water is made up of two elements: hydrogen and oxygen. Sure, you're familiar with that famous formula, but did you know that some types of water can ...
Hipervinculo Geología
Huff, puff and blow as hard as you can—do you think you can blow down a sand castle with your mighty breath? Blowing air erodes—wears away—sand and dirt. In Three Little Pigs, houses of straw or twigs ...
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