======Using a Measuring Cylinder====== **Materials: **{{$demo.materials_description}}\\ **Difficulty: **{{$demo.difficulty_description}}\\ **Safety: **{{$demo.safety_description}}\\ \\ **Categories:** {{$demo.categories}} \\ **Alternative titles:** Measuring Liquids Accurately ====Summary==== {{$demo.summary}} ====Procedure==== -Place the measuring cylinder on a flat, stable surface. -Pour the liquid slowly into the cylinder without splashing. -Bend down so your eyes are level with the surface of the liquid. -Read the measurement at the bottom of the meniscus (the curved surface of the liquid). -Record the volume using the correct units (milliliters or cubic centimeters). ====Links==== Using a measuring cylinder - David Read: {{youtube>Q_X8yKlzbkg?}}\\ Measuring Volume Using a Graduated Cylinder - Wisc-Online: {{youtube>SE-nUsrbELE?}}\\ 📄 How to Read a Meniscus When Using Graduated Cylinders - westlab: [[https://www.westlab.com/blog/how-to-read-a-meniscus-when-using-graduated-cylinders]]\\ ====Variations==== *Try measuring different amounts of liquid to practice accuracy. *Compare measurements from different-sized cylinders. ====Safety Precautions==== *Handle glass cylinders carefully to avoid breakage. *Clean and dry the cylinder after use to prevent contamination. *Avoid overfilling to prevent spills. ====Questions to Consider==== *Why must you read the measurement at eye level? (To avoid parallax error and ensure accuracy.) *What is the meniscus, and why do we read from the bottom of it? (It is the curved surface of the liquid caused by surface tension; reading from the bottom gives a consistent and correct measurement.) *Why are measuring cylinders more accurate than beakers or flasks? (Because they are marked with finer volume graduations.)