Test tubes are used to hold small amounts of substance and materials for experiments or laboratory testing. The term test tube is also used to denote the processes performed or things produced in a laboratory.
2 Additional Answers
Test tubes are used to hold small amounts of matters in laboratory tests and experiments. They are cylindrical in shape and are made of clear glass. They are generally open at one end and curved at the other.
A test tube is a common piece of laboratory glassware with a rounded U-shaped bottom, open at the top and having a finger-like length. It is often featured with a flared lip to assist in pouring out the contents.