* No markings: Most test tubes don't have graduated markings to indicate specific volumes.
* Shape: The cylindrical shape of a test tube makes it difficult to get an accurate reading of the liquid level.
* Accuracy: Even if a test tube had markings, they wouldn't be as precise as graduated cylinders or pipettes.
What are test tubes used for?
* Holding and mixing small amounts of liquids
* Carrying out chemical reactions
* Growing cultures
* Storing samples
What should you use to measure volume?
* Graduated cylinders: These are designed for precise volume measurements.
* Pipettes: These are used to transfer specific volumes of liquids.
* Volumetric flasks: These are designed to hold a specific, accurate volume.
