Έλεγξε το αποτέλεσμα. Μάθημα χημείας στο σχολείο. Δοκιμαστικούς σωλήνες με πολύχρωμες ουσίες. Σχολικό εργαστήριο. Οι μαθητές της ομάδας σπουδάζουν χημικά υγρά. Κορίτσια και αγόρι φοιτητής διεξάγουν σχολικό πείραμα με υγρά. - Φωτογραφίες & Εικόνες Αρχείου

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