Oggi realizziamo un filtro per l’acqua. Non rendera’ l’acqua potabile ma trasformera’ acqua sporca in acqua limpida. Occorrente: Bottiglia di plastica da 1.5/2 litricotone idrofilosabbiasassi (ghiaia)acqua da purificare (potete aggiungere terra o fondo di caffe’ all’acqua del rubinetto) Il principio base e’ che l’acqua deve passare attraverso strati di materiale sempre piu’ sottile in modo…… Continue reading Esperimento filtro per l’acqua
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