How to Read a Graduated Cylinder Correctly: Meniscus Measurement Guide #40328 (License: Personal Use)

This educational diagram demonstrates how parallax error leads to inaccurate volume readings when viewing a graduated cylinder from above or below eye level. The red arrow indicates an incorrect reading of 19.8 mL due to viewing angle, while the green arrow shows the accurate 20 mL measurement aligned with the bottom of the meniscus. The blue curved line labels the meniscus-the concave surface formed by water in glass due to adhesion and cohesion forces.

Used in science education webpages, lab safety guides, and chemistry tutorials to teach accurate volumetric measurement; matches user intent for learning proper lab techniques or troubleshooting measurement errors.