test tube

A test tube is a small, cylindrical container typically made of glass or plastic used in scientific laboratories. It is designed to hold, mix, and observe small amounts of liquids or samples during experiments or tests. Test tubes often have round bottoms and an open top, making them easy to handle with tools like test tube racks or clamps. They are commonly used in chemistry, biology, and medical labs for tasks such as heating substances, conducting chemical reactions, or analyzing reactions on a small scale. The clear material allows scientists to easily observe the contents and changes.