In a test tube small reactions or experiments are performed. There are many different types of tubes. For example some have connectors, some are etched for measurements, some are hardened for durability.
En un tub d' assaig es porten a terme petites reaccions o experiments. Hi ha molts tipus de tubs. Alguns, per exemple, tenen connectors, d' altres estan gravats per fer mesures, i d' altres estan reforçats perquè durin més.