Two Hispanic California middle school science class students use a battery pH meter to measure water pH (acidity or alkalinity)

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Two Hispanic California middle school science class students use a battery-operated pH meter to measure the pH (acidity or alkalinity) of the water in their classroom's aquarium.

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Size: 3413px × 5120px
Location: Aliso Viejo, California
Photo credit: © Marmaduke St. John / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: acidity, alkalinity, aquarium, boy, boys, class, classes, electronic, electronically, fluid, fluids, girl, girls, hispanic, hispanics, institute, liquid, liquids, measure, meter, middle, ph, prove, school, schools, science, spanish, speaking, student, students, test, tests, verification, verify, water