A test tube is a laboratory tool used to hold, mix, or heat small quantities of liquid or solid samples. Test tubes are typically cylindrical in shape, with a rounded bottom and an open top. They come in a variety of sizes, ranging from a few millimeters in diameter to several centimeters in length.
Test tubes are typically made from glass or plastic, with glass test tubes being more common in research laboratories due to their ability to withstand high temperatures and chemical reactivity. Plastic test tubes are more commonly used in educational settings and for general laboratory work.
Test tubes can be used for a variety of applications, including mixing and reacting small quantities of chemicals, as well as for storing and heating small amounts of liquids or solids. They are also commonly used in biological and medical research to hold and analyze blood and urine samples.
One of the key advantages of test tubes is their versatility. They can be easily cleaned and sterilized for reuse, making them a cost-effective choice for laboratory work. They are also transparent, which allows for easy observation of the sample being tested or analyzed.
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